19958380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{2647}}^1$

素因数の和:2698

約数の個数: 48

約数和(自身を含む): 46710720

約数和(自身を除く): 26752340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 29, 52, 58, 65, 116, 130, 145, 260, 290, 377, 580, 754, 1508, 1885, 2647, 3770, 5294, 7540, 10588, 13235, 26470, 34411, 52940, 68822, 76763, 137644, 153526, 172055, 307052, 344110, 383815, 688220, 767630, 997919, 1535260, 1995838, 3991676, 4989595, 9979190, 19958380]

約数ペア:

[(1, 19958380), (2, 9979190), (4, 4989595), (5, 3991676), (10, 1995838), (13, 1535260), (20, 997919), (26, 767630), (29, 688220), (52, 383815), (58, 344110), (65, 307052), (116, 172055), (130, 153526), (145, 137644), (260, 76763), (290, 68822), (377, 52940), (580, 34411), (754, 26470), (1508, 13235), (1885, 10588), (2647, 7540), (3770, 5294)]