20351440

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3583}}^1$

素因数の和:3667

約数の個数: 40

約数和(自身を含む): 47996928

約数和(自身を除く): 27645488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3583, 5680, 7166, 14332, 17915, 28664, 35830, 57328, 71660, 143320, 254393, 286640, 508786, 1017572, 1271965, 2035144, 2543930, 4070288, 5087860, 10175720, 20351440]

約数ペア:

[(1, 20351440), (2, 10175720), (4, 5087860), (5, 4070288), (8, 2543930), (10, 2035144), (16, 1271965), (20, 1017572), (40, 508786), (71, 286640), (80, 254393), (142, 143320), (284, 71660), (355, 57328), (568, 35830), (710, 28664), (1136, 17915), (1420, 14332), (2840, 7166), (3583, 5680)]