396416840

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{319691}}^1$

素因数の和:319733

約数の個数: 32

約数和(自身を含む): 920712960

約数和(自身を除く): 524296120

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 319691, 639382, 1278764, 1598455, 2557528, 3196910, 6393820, 9910421, 12787640, 19820842, 39641684, 49552105, 79283368, 99104210, 198208420, 396416840]

約数ペア:

[(1, 396416840), (2, 198208420), (4, 99104210), (5, 79283368), (8, 49552105), (10, 39641684), (20, 19820842), (31, 12787640), (40, 9910421), (62, 6393820), (124, 3196910), (155, 2557528), (248, 1598455), (310, 1278764), (620, 639382), (1240, 319691)]