21586640

素因数分解:

$2^4\times 5^1\times {\mathrm{83}}^1\times {\mathrm{3251}}^1$

素因数の和:3347

約数の個数: 40

約数和(自身を含む): 50809248

約数和(自身を除く): 29222608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 83, 166, 332, 415, 664, 830, 1328, 1660, 3251, 3320, 6502, 6640, 13004, 16255, 26008, 32510, 52016, 65020, 130040, 260080, 269833, 539666, 1079332, 1349165, 2158664, 2698330, 4317328, 5396660, 10793320, 21586640]

約数ペア:

[(1, 21586640), (2, 10793320), (4, 5396660), (5, 4317328), (8, 2698330), (10, 2158664), (16, 1349165), (20, 1079332), (40, 539666), (80, 269833), (83, 260080), (166, 130040), (332, 65020), (415, 52016), (664, 32510), (830, 26008), (1328, 16255), (1660, 13004), (3251, 6640), (3320, 6502)]