21074680

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{227}}^1$

素因数の和:460

約数の個数: 64

約数和(自身を含む): 52202880

約数和(自身を除く): 31128200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 211, 220, 227, 422, 440, 454, 844, 908, 1055, 1135, 1688, 1816, 2110, 2270, 2321, 2497, 4220, 4540, 4642, 4994, 8440, 9080, 9284, 9988, 11605, 12485, 18568, 19976, 23210, 24970, 46420, 47897, 49940, 92840, 95794, 99880, 191588, 239485, 383176, 478970, 526867, 957940, 1053734, 1915880, 2107468, 2634335, 4214936, 5268670, 10537340, 21074680]

約数ペア:

[(1, 21074680), (2, 10537340), (4, 5268670), (5, 4214936), (8, 2634335), (10, 2107468), (11, 1915880), (20, 1053734), (22, 957940), (40, 526867), (44, 478970), (55, 383176), (88, 239485), (110, 191588), (211, 99880), (220, 95794), (227, 92840), (422, 49940), (440, 47897), (454, 46420), (844, 24970), (908, 23210), (1055, 19976), (1135, 18568), (1688, 12485), (1816, 11605), (2110, 9988), (2270, 9284), (2321, 9080), (2497, 8440), (4220, 4994), (4540, 4642)]