21781860

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{4079}}^1$

素因数の和:4180

約数の個数: 48

約数和(自身を含む): 61689600

約数和(自身を除く): 39907740

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, 4079, 5340, 8158, 12237, 16316, 20395, 24474, 40790, 48948, 61185, 81580, 122370, 244740, 363031, 726062, 1089093, 1452124, 1815155, 2178186, 3630310, 4356372, 5445465, 7260620, 10890930, 21781860]

約数ペア:

[(1, 21781860), (2, 10890930), (3, 7260620), (4, 5445465), (5, 4356372), (6, 3630310), (10, 2178186), (12, 1815155), (15, 1452124), (20, 1089093), (30, 726062), (60, 363031), (89, 244740), (178, 122370), (267, 81580), (356, 61185), (445, 48948), (534, 40790), (890, 24474), (1068, 20395), (1335, 16316), (1780, 12237), (2670, 8158), (4079, 5340)]