1280638840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{163}}^1\times {\mathrm{521}}^1$

素因数の和:737

約数の個数: 128

約数和(自身を含む): 3235982400

約数和(自身を除く): 1955343560

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 29, 40, 52, 58, 65, 104, 116, 130, 145, 163, 232, 260, 290, 326, 377, 520, 521, 580, 652, 754, 815, 1042, 1160, 1304, 1508, 1630, 1885, 2084, 2119, 2605, 3016, 3260, 3770, 4168, 4238, 4727, 5210, 6520, 6773, 7540, 8476, 9454, 10420, 10595, 13546, 15080, 15109, 16952, 18908, 20840, 21190, 23635, 27092, 30218, 33865, 37816, 42380, 47270, 54184, 60436, 61451, 67730, 75545, 84760, 84923, 94540, 120872, 122902, 135460, 151090, 169846, 189080, 196417, 245804, 270920, 302180, 307255, 339692, 392834, 424615, 491608, 604360, 614510, 679384, 785668, 849230, 982085, 1103999, 1229020, 1571336, 1698460, 1964170, 2207998, 2458040, 2462767, 3396920, 3928340, 4415996, 4925534, 5519995, 7856680, 8831992, 9851068, 11039990, 12313835, 19702136, 22079980, 24627670, 32015971, 44159960, 49255340, 64031942, 98510680, 128063884, 160079855, 256127768, 320159710, 640319420, 1280638840]

約数ペア:

[(1, 1280638840), (2, 640319420), (4, 320159710), (5, 256127768), (8, 160079855), (10, 128063884), (13, 98510680), (20, 64031942), (26, 49255340), (29, 44159960), (40, 32015971), (52, 24627670), (58, 22079980), (65, 19702136), (104, 12313835), (116, 11039990), (130, 9851068), (145, 8831992), (163, 7856680), (232, 5519995), (260, 4925534), (290, 4415996), (326, 3928340), (377, 3396920), (520, 2462767), (521, 2458040), (580, 2207998), (652, 1964170), (754, 1698460), (815, 1571336), (1042, 1229020), (1160, 1103999), (1304, 982085), (1508, 849230), (1630, 785668), (1885, 679384), (2084, 614510), (2119, 604360), (2605, 491608), (3016, 424615), (3260, 392834), (3770, 339692), (4168, 307255), (4238, 302180), (4727, 270920), (5210, 245804), (6520, 196417), (6773, 189080), (7540, 169846), (8476, 151090), (9454, 135460), (10420, 122902), (10595, 120872), (13546, 94540), (15080, 84923), (15109, 84760), (16952, 75545), (18908, 67730), (20840, 61451), (21190, 60436), (23635, 54184), (27092, 47270), (30218, 42380), (33865, 37816)]