20008940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{1091}}^1$

素因数の和:1238

約数の個数: 48

約数和(自身を含む): 48432384

約数和(自身を除く): 28423444

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 131, 140, 262, 524, 655, 917, 1091, 1310, 1834, 2182, 2620, 3668, 4364, 4585, 5455, 7637, 9170, 10910, 15274, 18340, 21820, 30548, 38185, 76370, 142921, 152740, 285842, 571684, 714605, 1000447, 1429210, 2000894, 2858420, 4001788, 5002235, 10004470, 20008940]

約数ペア:

[(1, 20008940), (2, 10004470), (4, 5002235), (5, 4001788), (7, 2858420), (10, 2000894), (14, 1429210), (20, 1000447), (28, 714605), (35, 571684), (70, 285842), (131, 152740), (140, 142921), (262, 76370), (524, 38185), (655, 30548), (917, 21820), (1091, 18340), (1310, 15274), (1834, 10910), (2182, 9170), (2620, 7637), (3668, 5455), (4364, 4585)]