81956405

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1637}}^1$

素因数の和:1709

約数の個数: 32

約数和(自身を含む): 113218560

約数和(自身を除く): 31262155

約数列:

[1, 5, 17, 19, 31, 85, 95, 155, 323, 527, 589, 1615, 1637, 2635, 2945, 8185, 10013, 27829, 31103, 50065, 50747, 139145, 155515, 253735, 528751, 862699, 964193, 2643755, 4313495, 4820965, 16391281, 81956405]

約数ペア:

[(1, 81956405), (5, 16391281), (17, 4820965), (19, 4313495), (31, 2643755), (85, 964193), (95, 862699), (155, 528751), (323, 253735), (527, 155515), (589, 139145), (1615, 50747), (1637, 50065), (2635, 31103), (2945, 27829), (8185, 10013)]