20433980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{719}}^1$

素因数の和:771

約数の個数: 72

約数和(自身を含む): 51710400

約数和(自身を除く): 31276420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 49, 58, 70, 98, 116, 140, 145, 196, 203, 245, 290, 406, 490, 580, 719, 812, 980, 1015, 1421, 1438, 2030, 2842, 2876, 3595, 4060, 5033, 5684, 7105, 7190, 10066, 14210, 14380, 20132, 20851, 25165, 28420, 35231, 41702, 50330, 70462, 83404, 100660, 104255, 140924, 145957, 176155, 208510, 291914, 352310, 417020, 583828, 704620, 729785, 1021699, 1459570, 2043398, 2919140, 4086796, 5108495, 10216990, 20433980]

約数ペア:

[(1, 20433980), (2, 10216990), (4, 5108495), (5, 4086796), (7, 2919140), (10, 2043398), (14, 1459570), (20, 1021699), (28, 729785), (29, 704620), (35, 583828), (49, 417020), (58, 352310), (70, 291914), (98, 208510), (116, 176155), (140, 145957), (145, 140924), (196, 104255), (203, 100660), (245, 83404), (290, 70462), (406, 50330), (490, 41702), (580, 35231), (719, 28420), (812, 25165), (980, 20851), (1015, 20132), (1421, 14380), (1438, 14210), (2030, 10066), (2842, 7190), (2876, 7105), (3595, 5684), (4060, 5033)]