20780620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{983}}^1$

素因数の和:1150

約数の個数: 48

約数和(自身を含む): 50254848

約数和(自身を除く): 29474228

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 151, 302, 604, 755, 983, 1057, 1510, 1966, 2114, 3020, 3932, 4228, 4915, 5285, 6881, 9830, 10570, 13762, 19660, 21140, 27524, 34405, 68810, 137620, 148433, 296866, 593732, 742165, 1039031, 1484330, 2078062, 2968660, 4156124, 5195155, 10390310, 20780620]

約数ペア:

[(1, 20780620), (2, 10390310), (4, 5195155), (5, 4156124), (7, 2968660), (10, 2078062), (14, 1484330), (20, 1039031), (28, 742165), (35, 593732), (70, 296866), (140, 148433), (151, 137620), (302, 68810), (604, 34405), (755, 27524), (983, 21140), (1057, 19660), (1510, 13762), (1966, 10570), (2114, 9830), (3020, 6881), (3932, 5285), (4228, 4915)]