20449660

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{271}}^1$

素因数の和:312

約数の個数: 96

約数和(自身を含む): 54835200

約数和(自身を除く): 34385540

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 49, 55, 70, 77, 98, 110, 140, 154, 196, 220, 245, 271, 308, 343, 385, 490, 539, 542, 686, 770, 980, 1078, 1084, 1355, 1372, 1540, 1715, 1897, 2156, 2695, 2710, 2981, 3430, 3773, 3794, 5390, 5420, 5962, 6860, 7546, 7588, 9485, 10780, 11924, 13279, 14905, 15092, 18865, 18970, 20867, 26558, 29810, 37730, 37940, 41734, 53116, 59620, 66395, 75460, 83468, 92953, 104335, 132790, 146069, 185906, 208670, 265580, 292138, 371812, 417340, 464765, 584276, 730345, 929530, 1022483, 1460690, 1859060, 2044966, 2921380, 4089932, 5112415, 10224830, 20449660]

約数ペア:

[(1, 20449660), (2, 10224830), (4, 5112415), (5, 4089932), (7, 2921380), (10, 2044966), (11, 1859060), (14, 1460690), (20, 1022483), (22, 929530), (28, 730345), (35, 584276), (44, 464765), (49, 417340), (55, 371812), (70, 292138), (77, 265580), (98, 208670), (110, 185906), (140, 146069), (154, 132790), (196, 104335), (220, 92953), (245, 83468), (271, 75460), (308, 66395), (343, 59620), (385, 53116), (490, 41734), (539, 37940), (542, 37730), (686, 29810), (770, 26558), (980, 20867), (1078, 18970), (1084, 18865), (1355, 15092), (1372, 14905), (1540, 13279), (1715, 11924), (1897, 10780), (2156, 9485), (2695, 7588), (2710, 7546), (2981, 6860), (3430, 5962), (3773, 5420), (3794, 5390)]