81531075

素因数分解:

$3^1\times 5^2\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{251}}^1$

素因数の和:396

約数の個数: 48

約数和(自身を含む): 139491072

約数和(自身を除く): 57959997

約数列:

[1, 3, 5, 15, 25, 61, 71, 75, 183, 213, 251, 305, 355, 753, 915, 1065, 1255, 1525, 1775, 3765, 4331, 4575, 5325, 6275, 12993, 15311, 17821, 18825, 21655, 45933, 53463, 64965, 76555, 89105, 108275, 229665, 267315, 324825, 382775, 445525, 1087081, 1148325, 1336575, 3261243, 5435405, 16306215, 27177025, 81531075]

約数ペア:

[(1, 81531075), (3, 27177025), (5, 16306215), (15, 5435405), (25, 3261243), (61, 1336575), (71, 1148325), (75, 1087081), (183, 445525), (213, 382775), (251, 324825), (305, 267315), (355, 229665), (753, 108275), (915, 89105), (1065, 76555), (1255, 64965), (1525, 53463), (1775, 45933), (3765, 21655), (4331, 18825), (4575, 17821), (5325, 15311), (6275, 12993)]