20974840

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{3217}}^1$

素因数の和:3391

約数の個数: 32

約数和(自身を含む): 47497680

約数和(自身を除く): 26522840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3217, 3260, 6434, 6520, 12868, 16085, 25736, 32170, 64340, 128680, 524371, 1048742, 2097484, 2621855, 4194968, 5243710, 10487420, 20974840]

約数ペア:

[(1, 20974840), (2, 10487420), (4, 5243710), (5, 4194968), (8, 2621855), (10, 2097484), (20, 1048742), (40, 524371), (163, 128680), (326, 64340), (652, 32170), (815, 25736), (1304, 16085), (1630, 12868), (3217, 6520), (3260, 6434)]