20861520

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{86923}}^1$

素因数の和:86939

約数の個数: 40

約数和(自身を含む): 64671456

約数和(自身を除く): 43809936

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 86923, 173846, 260769, 347692, 434615, 521538, 695384, 869230, 1043076, 1303845, 1390768, 1738460, 2086152, 2607690, 3476920, 4172304, 5215380, 6953840, 10430760, 20861520]

約数ペア:

[(1, 20861520), (2, 10430760), (3, 6953840), (4, 5215380), (5, 4172304), (6, 3476920), (8, 2607690), (10, 2086152), (12, 1738460), (15, 1390768), (16, 1303845), (20, 1043076), (24, 869230), (30, 695384), (40, 521538), (48, 434615), (60, 347692), (80, 260769), (120, 173846), (240, 86923)]