21413240

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{2083}}^1$

素因数の和:2351

約数の個数: 32

約数和(自身を含む): 48390480

約数和(自身を除く): 26977240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 2056, 2083, 2570, 4166, 5140, 8332, 10280, 10415, 16664, 20830, 41660, 83320, 535331, 1070662, 2141324, 2676655, 4282648, 5353310, 10706620, 21413240]

約数ペア:

[(1, 21413240), (2, 10706620), (4, 5353310), (5, 4282648), (8, 2676655), (10, 2141324), (20, 1070662), (40, 535331), (257, 83320), (514, 41660), (1028, 20830), (1285, 16664), (2056, 10415), (2083, 10280), (2570, 8332), (4166, 5140)]