28778840

素因数分解:

$2^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{6367}}^1$

素因数の和:6491

約数の個数: 32

約数和(自身を含む): 65335680

約数和(自身を除く): 36556840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 113, 226, 452, 565, 904, 1130, 2260, 4520, 6367, 12734, 25468, 31835, 50936, 63670, 127340, 254680, 719471, 1438942, 2877884, 3597355, 5755768, 7194710, 14389420, 28778840]

約数ペア:

[(1, 28778840), (2, 14389420), (4, 7194710), (5, 5755768), (8, 3597355), (10, 2877884), (20, 1438942), (40, 719471), (113, 254680), (226, 127340), (452, 63670), (565, 50936), (904, 31835), (1130, 25468), (2260, 12734), (4520, 6367)]