201990215

素因数分解:

$5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{2557}}^1$

素因数の和:2667

約数の個数: 32

約数和(自身を含む): 289279104

約数和(自身を除く): 87288889

約数列:

[1, 5, 7, 35, 37, 61, 185, 259, 305, 427, 1295, 2135, 2257, 2557, 11285, 12785, 15799, 17899, 78995, 89495, 94609, 155977, 473045, 662263, 779885, 1091839, 3311315, 5459195, 5771149, 28855745, 40398043, 201990215]

約数ペア:

[(1, 201990215), (5, 40398043), (7, 28855745), (35, 5771149), (37, 5459195), (61, 3311315), (185, 1091839), (259, 779885), (305, 662263), (427, 473045), (1295, 155977), (2135, 94609), (2257, 89495), (2557, 78995), (11285, 17899), (12785, 15799)]