19311820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2141}}^1$

素因数の和:2202

約数の個数: 48

約数和(自身を含む): 45341856

約数和(自身を除く): 26030036

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 164, 205, 220, 410, 451, 820, 902, 1804, 2141, 2255, 4282, 4510, 8564, 9020, 10705, 21410, 23551, 42820, 47102, 87781, 94204, 117755, 175562, 235510, 351124, 438905, 471020, 877810, 965591, 1755620, 1931182, 3862364, 4827955, 9655910, 19311820]

約数ペア:

[(1, 19311820), (2, 9655910), (4, 4827955), (5, 3862364), (10, 1931182), (11, 1755620), (20, 965591), (22, 877810), (41, 471020), (44, 438905), (55, 351124), (82, 235510), (110, 175562), (164, 117755), (205, 94204), (220, 87781), (410, 47102), (451, 42820), (820, 23551), (902, 21410), (1804, 10705), (2141, 9020), (2255, 8564), (4282, 4510)]