21456840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{178807}}^1$

素因数の和:178821

約数の個数: 32

約数和(自身を含む): 64370880

約数和(自身を除く): 42914040

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 178807, 357614, 536421, 715228, 894035, 1072842, 1430456, 1788070, 2145684, 2682105, 3576140, 4291368, 5364210, 7152280, 10728420, 21456840]

約数ペア:

[(1, 21456840), (2, 10728420), (3, 7152280), (4, 5364210), (5, 4291368), (6, 3576140), (8, 2682105), (10, 2145684), (12, 1788070), (15, 1430456), (20, 1072842), (24, 894035), (30, 715228), (40, 536421), (60, 357614), (120, 178807)]