21080390

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{157}}^1\times {\mathrm{463}}^1$

素因数の和:656

約数の個数: 32

約数和(自身を含む): 39588480

約数和(自身を除く): 18508090

約数列:

[1, 2, 5, 10, 29, 58, 145, 157, 290, 314, 463, 785, 926, 1570, 2315, 4553, 4630, 9106, 13427, 22765, 26854, 45530, 67135, 72691, 134270, 145382, 363455, 726910, 2108039, 4216078, 10540195, 21080390]

約数ペア:

[(1, 21080390), (2, 10540195), (5, 4216078), (10, 2108039), (29, 726910), (58, 363455), (145, 145382), (157, 134270), (290, 72691), (314, 67135), (463, 45530), (785, 26854), (926, 22765), (1570, 13427), (2315, 9106), (4553, 4630)]