20391280

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2801}}^1$

素因数の和:2834

約数の個数: 80

約数和(自身を含む): 58371264

約数和(自身を除く): 37979984

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 130, 140, 182, 208, 260, 280, 364, 455, 520, 560, 728, 910, 1040, 1456, 1820, 2801, 3640, 5602, 7280, 11204, 14005, 19607, 22408, 28010, 36413, 39214, 44816, 56020, 72826, 78428, 98035, 112040, 145652, 156856, 182065, 196070, 224080, 254891, 291304, 313712, 364130, 392140, 509782, 582608, 728260, 784280, 1019564, 1274455, 1456520, 1568560, 2039128, 2548910, 2913040, 4078256, 5097820, 10195640, 20391280]

約数ペア:

[(1, 20391280), (2, 10195640), (4, 5097820), (5, 4078256), (7, 2913040), (8, 2548910), (10, 2039128), (13, 1568560), (14, 1456520), (16, 1274455), (20, 1019564), (26, 784280), (28, 728260), (35, 582608), (40, 509782), (52, 392140), (56, 364130), (65, 313712), (70, 291304), (80, 254891), (91, 224080), (104, 196070), (112, 182065), (130, 156856), (140, 145652), (182, 112040), (208, 98035), (260, 78428), (280, 72826), (364, 56020), (455, 44816), (520, 39214), (560, 36413), (728, 28010), (910, 22408), (1040, 19607), (1456, 14005), (1820, 11204), (2801, 7280), (3640, 5602)]