18990530

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{661}}^1$

素因数の和:711

約数の個数: 48

約数和(自身を含む): 39251304

約数和(自身を除く): 20260774

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 65, 85, 130, 169, 170, 221, 338, 442, 661, 845, 1105, 1322, 1690, 2210, 2873, 3305, 5746, 6610, 8593, 11237, 14365, 17186, 22474, 28730, 42965, 56185, 85930, 111709, 112370, 146081, 223418, 292162, 558545, 730405, 1117090, 1460810, 1899053, 3798106, 9495265, 18990530]

約数ペア:

[(1, 18990530), (2, 9495265), (5, 3798106), (10, 1899053), (13, 1460810), (17, 1117090), (26, 730405), (34, 558545), (65, 292162), (85, 223418), (130, 146081), (169, 112370), (170, 111709), (221, 85930), (338, 56185), (442, 42965), (661, 28730), (845, 22474), (1105, 17186), (1322, 14365), (1690, 11237), (2210, 8593), (2873, 6610), (3305, 5746)]