256857320

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{359}}^1\times {\mathrm{577}}^1$

素因数の和:978

約数の個数: 64

約数和(自身を含む): 599270400

約数和(自身を除く): 342413080

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 359, 577, 620, 718, 1154, 1240, 1436, 1795, 2308, 2872, 2885, 3590, 4616, 5770, 7180, 11129, 11540, 14360, 17887, 22258, 23080, 35774, 44516, 55645, 71548, 89032, 89435, 111290, 143096, 178870, 207143, 222580, 357740, 414286, 445160, 715480, 828572, 1035715, 1657144, 2071430, 4142860, 6421433, 8285720, 12842866, 25685732, 32107165, 51371464, 64214330, 128428660, 256857320]

約数ペア:

[(1, 256857320), (2, 128428660), (4, 64214330), (5, 51371464), (8, 32107165), (10, 25685732), (20, 12842866), (31, 8285720), (40, 6421433), (62, 4142860), (124, 2071430), (155, 1657144), (248, 1035715), (310, 828572), (359, 715480), (577, 445160), (620, 414286), (718, 357740), (1154, 222580), (1240, 207143), (1436, 178870), (1795, 143096), (2308, 111290), (2872, 89435), (2885, 89032), (3590, 71548), (4616, 55645), (5770, 44516), (7180, 35774), (11129, 23080), (11540, 22258), (14360, 17887)]