21199930

素因数分解:

$2^1\times 5^1\times {\mathrm{73}}^1\times {\mathrm{113}}^1\times {\mathrm{257}}^1$

素因数の和:450

約数の個数: 32

約数和(自身を含む): 39176784

約数和(自身を除く): 17976854

約数列:

[1, 2, 5, 10, 73, 113, 146, 226, 257, 365, 514, 565, 730, 1130, 1285, 2570, 8249, 16498, 18761, 29041, 37522, 41245, 58082, 82490, 93805, 145205, 187610, 290410, 2119993, 4239986, 10599965, 21199930]

約数ペア:

[(1, 21199930), (2, 10599965), (5, 4239986), (10, 2119993), (73, 290410), (113, 187610), (146, 145205), (226, 93805), (257, 82490), (365, 58082), (514, 41245), (565, 37522), (730, 29041), (1130, 18761), (1285, 16498), (2570, 8249)]