81201640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{156157}}^1$

素因数の和:156181

約数の個数: 32

約数和(自身を含む): 196759080

約数和(自身を除く): 115557440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 156157, 312314, 624628, 780785, 1249256, 1561570, 2030041, 3123140, 4060082, 6246280, 8120164, 10150205, 16240328, 20300410, 40600820, 81201640]

約数ペア:

[(1, 81201640), (2, 40600820), (4, 20300410), (5, 16240328), (8, 10150205), (10, 8120164), (13, 6246280), (20, 4060082), (26, 3123140), (40, 2030041), (52, 1561570), (65, 1249256), (104, 780785), (130, 624628), (260, 312314), (520, 156157)]