20649780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1289}}^1$

素因数の和:1393

約数の個数: 72

約数和(自身を含む): 63390600

約数和(自身を除く): 42740820

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 89, 90, 178, 180, 267, 356, 445, 534, 801, 890, 1068, 1289, 1335, 1602, 1780, 2578, 2670, 3204, 3867, 4005, 5156, 5340, 6445, 7734, 8010, 11601, 12890, 15468, 16020, 19335, 23202, 25780, 38670, 46404, 58005, 77340, 114721, 116010, 229442, 232020, 344163, 458884, 573605, 688326, 1032489, 1147210, 1376652, 1720815, 2064978, 2294420, 3441630, 4129956, 5162445, 6883260, 10324890, 20649780]

約数ペア:

[(1, 20649780), (2, 10324890), (3, 6883260), (4, 5162445), (5, 4129956), (6, 3441630), (9, 2294420), (10, 2064978), (12, 1720815), (15, 1376652), (18, 1147210), (20, 1032489), (30, 688326), (36, 573605), (45, 458884), (60, 344163), (89, 232020), (90, 229442), (178, 116010), (180, 114721), (267, 77340), (356, 58005), (445, 46404), (534, 38670), (801, 25780), (890, 23202), (1068, 19335), (1289, 16020), (1335, 15468), (1602, 12890), (1780, 11601), (2578, 8010), (2670, 7734), (3204, 6445), (3867, 5340), (4005, 5156)]