21804560

素因数分解:

$2^4\times 5^1\times {\mathrm{191}}^1\times {\mathrm{1427}}^1$

素因数の和:1631

約数の個数: 40

約数和(自身を含む): 50996736

約数和(自身を除く): 29192176

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 191, 382, 764, 955, 1427, 1528, 1910, 2854, 3056, 3820, 5708, 7135, 7640, 11416, 14270, 15280, 22832, 28540, 57080, 114160, 272557, 545114, 1090228, 1362785, 2180456, 2725570, 4360912, 5451140, 10902280, 21804560]

約数ペア:

[(1, 21804560), (2, 10902280), (4, 5451140), (5, 4360912), (8, 2725570), (10, 2180456), (16, 1362785), (20, 1090228), (40, 545114), (80, 272557), (191, 114160), (382, 57080), (764, 28540), (955, 22832), (1427, 15280), (1528, 14270), (1910, 11416), (2854, 7640), (3056, 7135), (3820, 5708)]