20903090

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{6991}}^1$

素因数の和:7034

約数の個数: 32

約数和(自身を含む): 42287616

約数和(自身を除く): 21384526

約数列:

[1, 2, 5, 10, 13, 23, 26, 46, 65, 115, 130, 230, 299, 598, 1495, 2990, 6991, 13982, 34955, 69910, 90883, 160793, 181766, 321586, 454415, 803965, 908830, 1607930, 2090309, 4180618, 10451545, 20903090]

約数ペア:

[(1, 20903090), (2, 10451545), (5, 4180618), (10, 2090309), (13, 1607930), (23, 908830), (26, 803965), (46, 454415), (65, 321586), (115, 181766), (130, 160793), (230, 90883), (299, 69910), (598, 34955), (1495, 13982), (2990, 6991)]