21559340

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^2\times {\mathrm{53}}^1$

素因数の和:159

約数の個数: 72

約数和(自身を含む): 51519888

約数和(自身を除く): 29960548

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 43, 44, 53, 55, 86, 106, 110, 172, 212, 215, 220, 265, 430, 473, 530, 583, 860, 946, 1060, 1166, 1849, 1892, 2279, 2332, 2365, 2915, 3698, 4558, 4730, 5830, 7396, 9116, 9245, 9460, 11395, 11660, 18490, 20339, 22790, 25069, 36980, 40678, 45580, 50138, 81356, 97997, 100276, 101695, 125345, 195994, 203390, 250690, 391988, 406780, 489985, 501380, 979970, 1077967, 1959940, 2155934, 4311868, 5389835, 10779670, 21559340]

約数ペア:

[(1, 21559340), (2, 10779670), (4, 5389835), (5, 4311868), (10, 2155934), (11, 1959940), (20, 1077967), (22, 979970), (43, 501380), (44, 489985), (53, 406780), (55, 391988), (86, 250690), (106, 203390), (110, 195994), (172, 125345), (212, 101695), (215, 100276), (220, 97997), (265, 81356), (430, 50138), (473, 45580), (530, 40678), (583, 36980), (860, 25069), (946, 22790), (1060, 20339), (1166, 18490), (1849, 11660), (1892, 11395), (2279, 9460), (2332, 9245), (2365, 9116), (2915, 7396), (3698, 5830), (4558, 4730)]