20969118640

素因数分解:

$2^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{673}}^1\times {\mathrm{5813}}^1$

素因数の和:6566

約数の個数: 80

約数和(自身を含む): 49562908128

約数和(自身を除く): 28593789488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 67, 80, 134, 268, 335, 536, 670, 673, 1072, 1340, 1346, 2680, 2692, 3365, 5360, 5384, 5813, 6730, 10768, 11626, 13460, 23252, 26920, 29065, 45091, 46504, 53840, 58130, 90182, 93008, 116260, 180364, 225455, 232520, 360728, 389471, 450910, 465040, 721456, 778942, 901820, 1557884, 1803640, 1947355, 3115768, 3607280, 3894710, 3912149, 6231536, 7789420, 7824298, 15578840, 15648596, 19560745, 31157680, 31297192, 39121490, 62594384, 78242980, 156485960, 262113983, 312971920, 524227966, 1048455932, 1310569915, 2096911864, 2621139830, 4193823728, 5242279660, 10484559320, 20969118640]

約数ペア:

[(1, 20969118640), (2, 10484559320), (4, 5242279660), (5, 4193823728), (8, 2621139830), (10, 2096911864), (16, 1310569915), (20, 1048455932), (40, 524227966), (67, 312971920), (80, 262113983), (134, 156485960), (268, 78242980), (335, 62594384), (536, 39121490), (670, 31297192), (673, 31157680), (1072, 19560745), (1340, 15648596), (1346, 15578840), (2680, 7824298), (2692, 7789420), (3365, 6231536), (5360, 3912149), (5384, 3894710), (5813, 3607280), (6730, 3115768), (10768, 1947355), (11626, 1803640), (13460, 1557884), (23252, 901820), (26920, 778942), (29065, 721456), (45091, 465040), (46504, 450910), (53840, 389471), (58130, 360728), (90182, 232520), (93008, 225455), (116260, 180364)]