20724540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{3881}}^1$

素因数の和:3982

約数の個数: 48

約数和(自身を含む): 58695840

約数和(自身を除く): 37971300

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 89, 178, 267, 356, 445, 534, 890, 1068, 1335, 1780, 2670, 3881, 5340, 7762, 11643, 15524, 19405, 23286, 38810, 46572, 58215, 77620, 116430, 232860, 345409, 690818, 1036227, 1381636, 1727045, 2072454, 3454090, 4144908, 5181135, 6908180, 10362270, 20724540]

約数ペア:

[(1, 20724540), (2, 10362270), (3, 6908180), (4, 5181135), (5, 4144908), (6, 3454090), (10, 2072454), (12, 1727045), (15, 1381636), (20, 1036227), (30, 690818), (60, 345409), (89, 232860), (178, 116430), (267, 77620), (356, 58215), (445, 46572), (534, 38810), (890, 23286), (1068, 19405), (1335, 15524), (1780, 11643), (2670, 7762), (3881, 5340)]