21300520

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{28027}}^1$

素因数の和:28057

約数の個数: 32

約数和(自身を含む): 50450400

約数和(自身を除く): 29149880

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 28027, 56054, 112108, 140135, 224216, 280270, 532513, 560540, 1065026, 1121080, 2130052, 2662565, 4260104, 5325130, 10650260, 21300520]

約数ペア:

[(1, 21300520), (2, 10650260), (4, 5325130), (5, 4260104), (8, 2662565), (10, 2130052), (19, 1121080), (20, 1065026), (38, 560540), (40, 532513), (76, 280270), (95, 224216), (152, 140135), (190, 112108), (380, 56054), (760, 28027)]