21151700

素因数分解:

$2^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{4919}}^1$

素因数の和:4976

約数の個数: 36

約数和(自身を含む): 46976160

約数和(自身を除く): 25824460

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 50, 86, 100, 172, 215, 430, 860, 1075, 2150, 4300, 4919, 9838, 19676, 24595, 49190, 98380, 122975, 211517, 245950, 423034, 491900, 846068, 1057585, 2115170, 4230340, 5287925, 10575850, 21151700]

約数ペア:

[(1, 21151700), (2, 10575850), (4, 5287925), (5, 4230340), (10, 2115170), (20, 1057585), (25, 846068), (43, 491900), (50, 423034), (86, 245950), (100, 211517), (172, 122975), (215, 98380), (430, 49190), (860, 24595), (1075, 19676), (2150, 9838), (4300, 4919)]