20213440880

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{557}}^1\times {\mathrm{14633}}^1$

素因数の和:15234

約数の個数: 80

約数和(自身を含む): 48602674944

約数和(自身を除く): 28389234064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 557, 620, 1114, 1240, 2228, 2480, 2785, 4456, 5570, 8912, 11140, 14633, 17267, 22280, 29266, 34534, 44560, 58532, 69068, 73165, 86335, 117064, 138136, 146330, 172670, 234128, 276272, 292660, 345340, 453623, 585320, 690680, 907246, 1170640, 1381360, 1814492, 2268115, 3628984, 4536230, 7257968, 8150581, 9072460, 16301162, 18144920, 32602324, 36289840, 40752905, 65204648, 81505810, 130409296, 163011620, 252668011, 326023240, 505336022, 652046480, 1010672044, 1263340055, 2021344088, 2526680110, 4042688176, 5053360220, 10106720440, 20213440880]

約数ペア:

[(1, 20213440880), (2, 10106720440), (4, 5053360220), (5, 4042688176), (8, 2526680110), (10, 2021344088), (16, 1263340055), (20, 1010672044), (31, 652046480), (40, 505336022), (62, 326023240), (80, 252668011), (124, 163011620), (155, 130409296), (248, 81505810), (310, 65204648), (496, 40752905), (557, 36289840), (620, 32602324), (1114, 18144920), (1240, 16301162), (2228, 9072460), (2480, 8150581), (2785, 7257968), (4456, 4536230), (5570, 3628984), (8912, 2268115), (11140, 1814492), (14633, 1381360), (17267, 1170640), (22280, 907246), (29266, 690680), (34534, 585320), (44560, 453623), (58532, 345340), (69068, 292660), (73165, 276272), (86335, 234128), (117064, 172670), (138136, 146330)]