1380880

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{421}}^1$

素因数の和:475

約数の個数: 40

約数和(自身を含む): 3296664

約数和(自身を除く): 1915784

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 421, 656, 820, 842, 1640, 1684, 2105, 3280, 3368, 4210, 6736, 8420, 16840, 17261, 33680, 34522, 69044, 86305, 138088, 172610, 276176, 345220, 690440, 1380880]

約数ペア:

[(1, 1380880), (2, 690440), (4, 345220), (5, 276176), (8, 172610), (10, 138088), (16, 86305), (20, 69044), (40, 34522), (41, 33680), (80, 17261), (82, 16840), (164, 8420), (205, 6736), (328, 4210), (410, 3368), (421, 3280), (656, 2105), (820, 1684), (842, 1640)]