21548780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2389}}^1$

素因数の和:2450

約数の個数: 48

約数和(自身を含む): 50591520

約数和(自身を除く): 29042740

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 164, 205, 220, 410, 451, 820, 902, 1804, 2255, 2389, 4510, 4778, 9020, 9556, 11945, 23890, 26279, 47780, 52558, 97949, 105116, 131395, 195898, 262790, 391796, 489745, 525580, 979490, 1077439, 1958980, 2154878, 4309756, 5387195, 10774390, 21548780]

約数ペア:

[(1, 21548780), (2, 10774390), (4, 5387195), (5, 4309756), (10, 2154878), (11, 1958980), (20, 1077439), (22, 979490), (41, 525580), (44, 489745), (55, 391796), (82, 262790), (110, 195898), (164, 131395), (205, 105116), (220, 97949), (410, 52558), (451, 47780), (820, 26279), (902, 23890), (1804, 11945), (2255, 9556), (2389, 9020), (4510, 4778)]