20145920

素因数分解:

$2^8\times 5^1\times {\mathrm{15739}}^1$

素因数の和:15760

約数の個数: 36

約数和(自身を含む): 48258840

約数和(自身を除く): 28112920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 15739, 31478, 62956, 78695, 125912, 157390, 251824, 314780, 503648, 629560, 1007296, 1259120, 2014592, 2518240, 4029184, 5036480, 10072960, 20145920]

約数ペア:

[(1, 20145920), (2, 10072960), (4, 5036480), (5, 4029184), (8, 2518240), (10, 2014592), (16, 1259120), (20, 1007296), (32, 629560), (40, 503648), (64, 314780), (80, 251824), (128, 157390), (160, 125912), (256, 78695), (320, 62956), (640, 31478), (1280, 15739)]