18498740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^3\times {\mathrm{421}}^1$

素因数の和:469

約数の個数: 48

約数和(自身を含む): 42183120

約数和(自身を除く): 23684380

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 421, 676, 842, 845, 1684, 1690, 2105, 2197, 3380, 4210, 4394, 5473, 8420, 8788, 10946, 10985, 21892, 21970, 27365, 43940, 54730, 71149, 109460, 142298, 284596, 355745, 711490, 924937, 1422980, 1849874, 3699748, 4624685, 9249370, 18498740]

約数ペア:

[(1, 18498740), (2, 9249370), (4, 4624685), (5, 3699748), (10, 1849874), (13, 1422980), (20, 924937), (26, 711490), (52, 355745), (65, 284596), (130, 142298), (169, 109460), (260, 71149), (338, 54730), (421, 43940), (676, 27365), (842, 21970), (845, 21892), (1684, 10985), (1690, 10946), (2105, 8788), (2197, 8420), (3380, 5473), (4210, 4394)]