21726920

素因数分解:

$2^3\times 5^1\times {\mathrm{281}}^1\times {\mathrm{1933}}^1$

素因数の和:2225

約数の個数: 32

約数和(自身を含む): 49084920

約数和(自身を除く): 27358000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 281, 562, 1124, 1405, 1933, 2248, 2810, 3866, 5620, 7732, 9665, 11240, 15464, 19330, 38660, 77320, 543173, 1086346, 2172692, 2715865, 4345384, 5431730, 10863460, 21726920]

約数ペア:

[(1, 21726920), (2, 10863460), (4, 5431730), (5, 4345384), (8, 2715865), (10, 2172692), (20, 1086346), (40, 543173), (281, 77320), (562, 38660), (1124, 19330), (1405, 15464), (1933, 11240), (2248, 9665), (2810, 7732), (3866, 5620)]