28878720

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{89}}^1$

素因数の和:137

約数の個数: 192

約数和(自身を含む): 100796400

約数和(自身を除く): 71917680

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 48, 52, 60, 64, 65, 78, 80, 89, 96, 104, 120, 128, 130, 156, 160, 169, 178, 192, 195, 208, 240, 260, 267, 312, 320, 338, 356, 384, 390, 416, 445, 480, 507, 520, 534, 624, 640, 676, 712, 780, 832, 845, 890, 960, 1014, 1040, 1068, 1157, 1248, 1335, 1352, 1424, 1560, 1664, 1690, 1780, 1920, 2028, 2080, 2136, 2314, 2496, 2535, 2670, 2704, 2848, 3120, 3380, 3471, 3560, 4056, 4160, 4272, 4628, 4992, 5070, 5340, 5408, 5696, 5785, 6240, 6760, 6942, 7120, 8112, 8320, 8544, 9256, 10140, 10680, 10816, 11392, 11570, 12480, 13520, 13884, 14240, 15041, 16224, 17088, 17355, 18512, 20280, 21360, 21632, 23140, 24960, 27040, 27768, 28480, 30082, 32448, 34176, 34710, 37024, 40560, 42720, 45123, 46280, 54080, 55536, 56960, 60164, 64896, 69420, 74048, 75205, 81120, 85440, 90246, 92560, 108160, 111072, 120328, 138840, 148096, 150410, 162240, 170880, 180492, 185120, 222144, 225615, 240656, 277680, 300820, 324480, 360984, 370240, 444288, 451230, 481312, 555360, 601640, 721968, 740480, 902460, 962624, 1110720, 1203280, 1443936, 1804920, 1925248, 2221440, 2406560, 2887872, 3609840, 4813120, 5775744, 7219680, 9626240, 14439360, 28878720]

約数ペア:

[(1, 28878720), (2, 14439360), (3, 9626240), (4, 7219680), (5, 5775744), (6, 4813120), (8, 3609840), (10, 2887872), (12, 2406560), (13, 2221440), (15, 1925248), (16, 1804920), (20, 1443936), (24, 1203280), (26, 1110720), (30, 962624), (32, 902460), (39, 740480), (40, 721968), (48, 601640), (52, 555360), (60, 481312), (64, 451230), (65, 444288), (78, 370240), (80, 360984), (89, 324480), (96, 300820), (104, 277680), (120, 240656), (128, 225615), (130, 222144), (156, 185120), (160, 180492), (169, 170880), (178, 162240), (192, 150410), (195, 148096), (208, 138840), (240, 120328), (260, 111072), (267, 108160), (312, 92560), (320, 90246), (338, 85440), (356, 81120), (384, 75205), (390, 74048), (416, 69420), (445, 64896), (480, 60164), (507, 56960), (520, 55536), (534, 54080), (624, 46280), (640, 45123), (676, 42720), (712, 40560), (780, 37024), (832, 34710), (845, 34176), (890, 32448), (960, 30082), (1014, 28480), (1040, 27768), (1068, 27040), (1157, 24960), (1248, 23140), (1335, 21632), (1352, 21360), (1424, 20280), (1560, 18512), (1664, 17355), (1690, 17088), (1780, 16224), (1920, 15041), (2028, 14240), (2080, 13884), (2136, 13520), (2314, 12480), (2496, 11570), (2535, 11392), (2670, 10816), (2704, 10680), (2848, 10140), (3120, 9256), (3380, 8544), (3471, 8320), (3560, 8112), (4056, 7120), (4160, 6942), (4272, 6760), (4628, 6240), (4992, 5785), (5070, 5696), (5340, 5408)]