128258780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{15913}}^1$

素因数の和:15966

約数の個数: 48

約数和(自身を含む): 299437824

約数和(自身を除く): 171179044

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 260, 310, 403, 620, 806, 1612, 2015, 4030, 8060, 15913, 31826, 63652, 79565, 159130, 206869, 318260, 413738, 493303, 827476, 986606, 1034345, 1973212, 2068690, 2466515, 4137380, 4933030, 6412939, 9866060, 12825878, 25651756, 32064695, 64129390, 128258780]

約数ペア:

[(1, 128258780), (2, 64129390), (4, 32064695), (5, 25651756), (10, 12825878), (13, 9866060), (20, 6412939), (26, 4933030), (31, 4137380), (52, 2466515), (62, 2068690), (65, 1973212), (124, 1034345), (130, 986606), (155, 827476), (260, 493303), (310, 413738), (403, 318260), (620, 206869), (806, 159130), (1612, 79565), (2015, 63652), (4030, 31826), (8060, 15913)]