21689560

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1\times {\mathrm{139}}^1$

素因数の和:280

約数の個数: 64

約数和(自身を含む): 50803200

約数和(自身を除く): 29113640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 83, 94, 139, 166, 188, 235, 278, 332, 376, 415, 470, 556, 664, 695, 830, 940, 1112, 1390, 1660, 1880, 2780, 3320, 3901, 5560, 6533, 7802, 11537, 13066, 15604, 19505, 23074, 26132, 31208, 32665, 39010, 46148, 52264, 57685, 65330, 78020, 92296, 115370, 130660, 156040, 230740, 261320, 461480, 542239, 1084478, 2168956, 2711195, 4337912, 5422390, 10844780, 21689560]

約数ペア:

[(1, 21689560), (2, 10844780), (4, 5422390), (5, 4337912), (8, 2711195), (10, 2168956), (20, 1084478), (40, 542239), (47, 461480), (83, 261320), (94, 230740), (139, 156040), (166, 130660), (188, 115370), (235, 92296), (278, 78020), (332, 65330), (376, 57685), (415, 52264), (470, 46148), (556, 39010), (664, 32665), (695, 31208), (830, 26132), (940, 23074), (1112, 19505), (1390, 15604), (1660, 13066), (1880, 11537), (2780, 7802), (3320, 6533), (3901, 5560)]