21560440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2579}}^1$

素因数の和:2620

約数の個数: 64

約数和(自身を含む): 55728000

約数和(自身を除く): 34167560

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 38, 40, 44, 55, 76, 88, 95, 110, 152, 190, 209, 220, 380, 418, 440, 760, 836, 1045, 1672, 2090, 2579, 4180, 5158, 8360, 10316, 12895, 20632, 25790, 28369, 49001, 51580, 56738, 98002, 103160, 113476, 141845, 196004, 226952, 245005, 283690, 392008, 490010, 539011, 567380, 980020, 1078022, 1134760, 1960040, 2156044, 2695055, 4312088, 5390110, 10780220, 21560440]

約数ペア:

[(1, 21560440), (2, 10780220), (4, 5390110), (5, 4312088), (8, 2695055), (10, 2156044), (11, 1960040), (19, 1134760), (20, 1078022), (22, 980020), (38, 567380), (40, 539011), (44, 490010), (55, 392008), (76, 283690), (88, 245005), (95, 226952), (110, 196004), (152, 141845), (190, 113476), (209, 103160), (220, 98002), (380, 56738), (418, 51580), (440, 49001), (760, 28369), (836, 25790), (1045, 20632), (1672, 12895), (2090, 10316), (2579, 8360), (4180, 5158)]