19802965

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{613}}^1$

素因数の和:709

約数の個数: 32

約数和(自身を含む): 29707776

約数和(自身を除く): 9904811

約数列:

[1, 5, 7, 13, 35, 65, 71, 91, 355, 455, 497, 613, 923, 2485, 3065, 4291, 4615, 6461, 7969, 21455, 32305, 39845, 43523, 55783, 217615, 278915, 304661, 565799, 1523305, 2828995, 3960593, 19802965]

約数ペア:

[(1, 19802965), (5, 3960593), (7, 2828995), (13, 1523305), (35, 565799), (65, 304661), (71, 278915), (91, 217615), (355, 55783), (455, 43523), (497, 39845), (613, 32305), (923, 21455), (2485, 7969), (3065, 6461), (4291, 4615)]