320840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{617}}^1$

素因数の和:641

約数の個数: 32

約数和(自身を含む): 778680

約数和(自身を除く): 457840

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 617, 1234, 2468, 3085, 4936, 6170, 8021, 12340, 16042, 24680, 32084, 40105, 64168, 80210, 160420, 320840]

約数ペア:

[(1, 320840), (2, 160420), (4, 80210), (5, 64168), (8, 40105), (10, 32084), (13, 24680), (20, 16042), (26, 12340), (40, 8021), (52, 6170), (65, 4936), (104, 3085), (130, 2468), (260, 1234), (520, 617)]