81357405

素因数分解:

$3^1\times 5^1\times {\mathrm{73}}^1\times {\mathrm{191}}^1\times {\mathrm{389}}^1$

素因数の和:661

約数の個数: 32

約数和(自身を含む): 132986880

約数和(自身を除く): 51629475

約数列:

[1, 3, 5, 15, 73, 191, 219, 365, 389, 573, 955, 1095, 1167, 1945, 2865, 5835, 13943, 28397, 41829, 69715, 74299, 85191, 141985, 209145, 222897, 371495, 425955, 1114485, 5423827, 16271481, 27119135, 81357405]

約数ペア:

[(1, 81357405), (3, 27119135), (5, 16271481), (15, 5423827), (73, 1114485), (191, 425955), (219, 371495), (365, 222897), (389, 209145), (573, 141985), (955, 85191), (1095, 74299), (1167, 69715), (1945, 41829), (2865, 28397), (5835, 13943)]