81380740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{4243}}^1$

素因数の和:4396

約数の個数: 48

約数和(自身を含む): 196785792

約数和(自身を除く): 115405052

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 137, 140, 274, 548, 685, 959, 1370, 1918, 2740, 3836, 4243, 4795, 8486, 9590, 16972, 19180, 21215, 29701, 42430, 59402, 84860, 118804, 148505, 297010, 581291, 594020, 1162582, 2325164, 2906455, 4069037, 5812910, 8138074, 11625820, 16276148, 20345185, 40690370, 81380740]

約数ペア:

[(1, 81380740), (2, 40690370), (4, 20345185), (5, 16276148), (7, 11625820), (10, 8138074), (14, 5812910), (20, 4069037), (28, 2906455), (35, 2325164), (70, 1162582), (137, 594020), (140, 581291), (274, 297010), (548, 148505), (685, 118804), (959, 84860), (1370, 59402), (1918, 42430), (2740, 29701), (3836, 21215), (4243, 19180), (4795, 16972), (8486, 9590)]