20045720

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{719}}^1$

素因数の和:788

約数の個数: 64

約数和(自身を含む): 48988800

約数和(自身を除く): 28943080

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 41, 68, 82, 85, 136, 164, 170, 205, 328, 340, 410, 680, 697, 719, 820, 1394, 1438, 1640, 2788, 2876, 3485, 3595, 5576, 5752, 6970, 7190, 12223, 13940, 14380, 24446, 27880, 28760, 29479, 48892, 58958, 61115, 97784, 117916, 122230, 147395, 235832, 244460, 294790, 488920, 501143, 589580, 1002286, 1179160, 2004572, 2505715, 4009144, 5011430, 10022860, 20045720]

約数ペア:

[(1, 20045720), (2, 10022860), (4, 5011430), (5, 4009144), (8, 2505715), (10, 2004572), (17, 1179160), (20, 1002286), (34, 589580), (40, 501143), (41, 488920), (68, 294790), (82, 244460), (85, 235832), (136, 147395), (164, 122230), (170, 117916), (205, 97784), (328, 61115), (340, 58958), (410, 48892), (680, 29479), (697, 28760), (719, 27880), (820, 24446), (1394, 14380), (1438, 13940), (1640, 12223), (2788, 7190), (2876, 6970), (3485, 5752), (3595, 5576)]