390380

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{149}}^1$

素因数の和:289

約数の個数: 24

約数和(自身を含む): 831600

約数和(自身を除く): 441220

約数列:

[1, 2, 4, 5, 10, 20, 131, 149, 262, 298, 524, 596, 655, 745, 1310, 1490, 2620, 2980, 19519, 39038, 78076, 97595, 195190, 390380]

約数ペア:

[(1, 390380), (2, 195190), (4, 97595), (5, 78076), (10, 39038), (20, 19519), (131, 2980), (149, 2620), (262, 1490), (298, 1310), (524, 745), (596, 655)]