20872840

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{6287}}^1$

素因数の和:6381

約数の個数: 32

約数和(自身を含む): 47537280

約数和(自身を除く): 26664440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 6287, 12574, 25148, 31435, 50296, 62870, 125740, 251480, 521821, 1043642, 2087284, 2609105, 4174568, 5218210, 10436420, 20872840]

約数ペア:

[(1, 20872840), (2, 10436420), (4, 5218210), (5, 4174568), (8, 2609105), (10, 2087284), (20, 1043642), (40, 521821), (83, 251480), (166, 125740), (332, 62870), (415, 50296), (664, 31435), (830, 25148), (1660, 12574), (3320, 6287)]