28757120

素因数分解:

$2^7\times 5^1\times 7^3\times {\mathrm{131}}^1$

素因数の和:171

約数の個数: 128

約数和(自身を含む): 80784000

約数和(自身を除く): 52026880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 98, 112, 128, 131, 140, 160, 196, 224, 245, 262, 280, 320, 343, 392, 448, 490, 524, 560, 640, 655, 686, 784, 896, 917, 980, 1048, 1120, 1310, 1372, 1568, 1715, 1834, 1960, 2096, 2240, 2620, 2744, 3136, 3430, 3668, 3920, 4192, 4480, 4585, 5240, 5488, 6272, 6419, 6860, 7336, 7840, 8384, 9170, 10480, 10976, 12838, 13720, 14672, 15680, 16768, 18340, 20960, 21952, 25676, 27440, 29344, 31360, 32095, 36680, 41920, 43904, 44933, 51352, 54880, 58688, 64190, 73360, 83840, 89866, 102704, 109760, 117376, 128380, 146720, 179732, 205408, 219520, 224665, 256760, 293440, 359464, 410816, 449330, 513520, 586880, 718928, 821632, 898660, 1027040, 1437856, 1797320, 2054080, 2875712, 3594640, 4108160, 5751424, 7189280, 14378560, 28757120]

約数ペア:

[(1, 28757120), (2, 14378560), (4, 7189280), (5, 5751424), (7, 4108160), (8, 3594640), (10, 2875712), (14, 2054080), (16, 1797320), (20, 1437856), (28, 1027040), (32, 898660), (35, 821632), (40, 718928), (49, 586880), (56, 513520), (64, 449330), (70, 410816), (80, 359464), (98, 293440), (112, 256760), (128, 224665), (131, 219520), (140, 205408), (160, 179732), (196, 146720), (224, 128380), (245, 117376), (262, 109760), (280, 102704), (320, 89866), (343, 83840), (392, 73360), (448, 64190), (490, 58688), (524, 54880), (560, 51352), (640, 44933), (655, 43904), (686, 41920), (784, 36680), (896, 32095), (917, 31360), (980, 29344), (1048, 27440), (1120, 25676), (1310, 21952), (1372, 20960), (1568, 18340), (1715, 16768), (1834, 15680), (1960, 14672), (2096, 13720), (2240, 12838), (2620, 10976), (2744, 10480), (3136, 9170), (3430, 8384), (3668, 7840), (3920, 7336), (4192, 6860), (4480, 6419), (4585, 6272), (5240, 5488)]