20454640

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13457}}^1$

素因数の和:13489

約数の個数: 40

約数和(自身を含む): 50063760

約数和(自身を除く): 29609120

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13457, 26914, 53828, 67285, 107656, 134570, 215312, 255683, 269140, 511366, 538280, 1022732, 1076560, 1278415, 2045464, 2556830, 4090928, 5113660, 10227320, 20454640]

約数ペア:

[(1, 20454640), (2, 10227320), (4, 5113660), (5, 4090928), (8, 2556830), (10, 2045464), (16, 1278415), (19, 1076560), (20, 1022732), (38, 538280), (40, 511366), (76, 269140), (80, 255683), (95, 215312), (152, 134570), (190, 107656), (304, 67285), (380, 53828), (760, 26914), (1520, 13457)]