21138160

素因数分解:

$2^4\times 5^1\times {\mathrm{131}}^1\times {\mathrm{2017}}^1$

素因数の和:2161

約数の個数: 40

約数和(自身を含む): 49545936

約数和(自身を除く): 28407776

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 131, 262, 524, 655, 1048, 1310, 2017, 2096, 2620, 4034, 5240, 8068, 10085, 10480, 16136, 20170, 32272, 40340, 80680, 161360, 264227, 528454, 1056908, 1321135, 2113816, 2642270, 4227632, 5284540, 10569080, 21138160]

約数ペア:

[(1, 21138160), (2, 10569080), (4, 5284540), (5, 4227632), (8, 2642270), (10, 2113816), (16, 1321135), (20, 1056908), (40, 528454), (80, 264227), (131, 161360), (262, 80680), (524, 40340), (655, 32272), (1048, 20170), (1310, 16136), (2017, 10480), (2096, 10085), (2620, 8068), (4034, 5240)]