21253440

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{131}}^1$

素因数の和:177

約数の個数: 168

約数和(自身を含む): 73627488

約数和(自身を除く): 52374048

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, 96, 104, 120, 130, 131, 156, 160, 169, 192, 195, 208, 240, 260, 262, 312, 320, 338, 390, 393, 416, 480, 507, 520, 524, 624, 655, 676, 780, 786, 832, 845, 960, 1014, 1040, 1048, 1248, 1310, 1352, 1560, 1572, 1690, 1703, 1965, 2028, 2080, 2096, 2496, 2535, 2620, 2704, 3120, 3144, 3380, 3406, 3930, 4056, 4160, 4192, 5070, 5109, 5240, 5408, 6240, 6288, 6760, 6812, 7860, 8112, 8384, 8515, 10140, 10218, 10480, 10816, 12480, 12576, 13520, 13624, 15720, 16224, 17030, 20280, 20436, 20960, 22139, 25152, 25545, 27040, 27248, 31440, 32448, 34060, 40560, 40872, 41920, 44278, 51090, 54080, 54496, 62880, 66417, 68120, 81120, 81744, 88556, 102180, 108992, 110695, 125760, 132834, 136240, 162240, 163488, 177112, 204360, 221390, 265668, 272480, 326976, 332085, 354224, 408720, 442780, 531336, 544960, 664170, 708448, 817440, 885560, 1062672, 1328340, 1416896, 1634880, 1771120, 2125344, 2656680, 3542240, 4250688, 5313360, 7084480, 10626720, 21253440]

約数ペア:

[(1, 21253440), (2, 10626720), (3, 7084480), (4, 5313360), (5, 4250688), (6, 3542240), (8, 2656680), (10, 2125344), (12, 1771120), (13, 1634880), (15, 1416896), (16, 1328340), (20, 1062672), (24, 885560), (26, 817440), (30, 708448), (32, 664170), (39, 544960), (40, 531336), (48, 442780), (52, 408720), (60, 354224), (64, 332085), (65, 326976), (78, 272480), (80, 265668), (96, 221390), (104, 204360), (120, 177112), (130, 163488), (131, 162240), (156, 136240), (160, 132834), (169, 125760), (192, 110695), (195, 108992), (208, 102180), (240, 88556), (260, 81744), (262, 81120), (312, 68120), (320, 66417), (338, 62880), (390, 54496), (393, 54080), (416, 51090), (480, 44278), (507, 41920), (520, 40872), (524, 40560), (624, 34060), (655, 32448), (676, 31440), (780, 27248), (786, 27040), (832, 25545), (845, 25152), (960, 22139), (1014, 20960), (1040, 20436), (1048, 20280), (1248, 17030), (1310, 16224), (1352, 15720), (1560, 13624), (1572, 13520), (1690, 12576), (1703, 12480), (1965, 10816), (2028, 10480), (2080, 10218), (2096, 10140), (2496, 8515), (2535, 8384), (2620, 8112), (2704, 7860), (3120, 6812), (3144, 6760), (3380, 6288), (3406, 6240), (3930, 5408), (4056, 5240), (4160, 5109), (4192, 5070)]