690440

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{421}}^1$

素因数の和:473

約数の個数: 32

約数和(自身を含む): 1595160

約数和(自身を除く): 904720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 421, 820, 842, 1640, 1684, 2105, 3368, 4210, 8420, 16840, 17261, 34522, 69044, 86305, 138088, 172610, 345220, 690440]

約数ペア:

[(1, 690440), (2, 345220), (4, 172610), (5, 138088), (8, 86305), (10, 69044), (20, 34522), (40, 17261), (41, 16840), (82, 8420), (164, 4210), (205, 3368), (328, 2105), (410, 1684), (421, 1640), (820, 842)]