81284840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{163}}^1$

素因数の和:331

約数の個数: 128

約数和(自身を含む): 228130560

約数和(自身を除く): 146845720

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 91, 104, 130, 137, 140, 163, 182, 260, 274, 280, 326, 364, 455, 520, 548, 652, 685, 728, 815, 910, 959, 1096, 1141, 1304, 1370, 1630, 1781, 1820, 1918, 2119, 2282, 2740, 3260, 3562, 3640, 3836, 4238, 4564, 4795, 5480, 5705, 6520, 7124, 7672, 8476, 8905, 9128, 9590, 10595, 11410, 12467, 14248, 14833, 16952, 17810, 19180, 21190, 22331, 22820, 24934, 29666, 35620, 38360, 42380, 44662, 45640, 49868, 59332, 62335, 71240, 74165, 84760, 89324, 99736, 111655, 118664, 124670, 148330, 156317, 178648, 223310, 249340, 290303, 296660, 312634, 446620, 498680, 580606, 593320, 625268, 781585, 893240, 1161212, 1250536, 1451515, 1563170, 2032121, 2322424, 2903030, 3126340, 4064242, 5806060, 6252680, 8128484, 10160605, 11612120, 16256968, 20321210, 40642420, 81284840]

約数ペア:

[(1, 81284840), (2, 40642420), (4, 20321210), (5, 16256968), (7, 11612120), (8, 10160605), (10, 8128484), (13, 6252680), (14, 5806060), (20, 4064242), (26, 3126340), (28, 2903030), (35, 2322424), (40, 2032121), (52, 1563170), (56, 1451515), (65, 1250536), (70, 1161212), (91, 893240), (104, 781585), (130, 625268), (137, 593320), (140, 580606), (163, 498680), (182, 446620), (260, 312634), (274, 296660), (280, 290303), (326, 249340), (364, 223310), (455, 178648), (520, 156317), (548, 148330), (652, 124670), (685, 118664), (728, 111655), (815, 99736), (910, 89324), (959, 84760), (1096, 74165), (1141, 71240), (1304, 62335), (1370, 59332), (1630, 49868), (1781, 45640), (1820, 44662), (1918, 42380), (2119, 38360), (2282, 35620), (2740, 29666), (3260, 24934), (3562, 22820), (3640, 22331), (3836, 21190), (4238, 19180), (4564, 17810), (4795, 16952), (5480, 14833), (5705, 14248), (6520, 12467), (7124, 11410), (7672, 10595), (8476, 9590), (8905, 9128)]