21581520

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{89923}}^1$

素因数の和:89939

約数の個数: 40

約数和(自身を含む): 66903456

約数和(自身を除く): 45321936

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 89923, 179846, 269769, 359692, 449615, 539538, 719384, 899230, 1079076, 1348845, 1438768, 1798460, 2158152, 2697690, 3596920, 4316304, 5395380, 7193840, 10790760, 21581520]

約数ペア:

[(1, 21581520), (2, 10790760), (3, 7193840), (4, 5395380), (5, 4316304), (6, 3596920), (8, 2697690), (10, 2158152), (12, 1798460), (15, 1438768), (16, 1348845), (20, 1079076), (24, 899230), (30, 719384), (40, 539538), (48, 449615), (60, 359692), (80, 269769), (120, 179846), (240, 89923)]