404560

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{389}}^1$

素因数の和:415

約数の個数: 40

約数和(自身を含む): 1015560

約数和(自身を除く): 611000

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 389, 520, 778, 1040, 1556, 1945, 3112, 3890, 5057, 6224, 7780, 10114, 15560, 20228, 25285, 31120, 40456, 50570, 80912, 101140, 202280, 404560]

約数ペア:

[(1, 404560), (2, 202280), (4, 101140), (5, 80912), (8, 50570), (10, 40456), (13, 31120), (16, 25285), (20, 20228), (26, 15560), (40, 10114), (52, 7780), (65, 6224), (80, 5057), (104, 3890), (130, 3112), (208, 1945), (260, 1556), (389, 1040), (520, 778)]