21049160

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{4349}}^1$

素因数の和:4382

約数の個数: 48

約数和(自身を含む): 52069500

約数和(自身を除く): 31020340

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 4349, 4840, 8698, 17396, 21745, 34792, 43490, 47839, 86980, 95678, 173960, 191356, 239195, 382712, 478390, 526229, 956780, 1052458, 1913560, 2104916, 2631145, 4209832, 5262290, 10524580, 21049160]

約数ペア:

[(1, 21049160), (2, 10524580), (4, 5262290), (5, 4209832), (8, 2631145), (10, 2104916), (11, 1913560), (20, 1052458), (22, 956780), (40, 526229), (44, 478390), (55, 382712), (88, 239195), (110, 191356), (121, 173960), (220, 95678), (242, 86980), (440, 47839), (484, 43490), (605, 34792), (968, 21745), (1210, 17396), (2420, 8698), (4349, 4840)]