20656870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{719}}^1$

素因数の和:769

約数の個数: 48

約数和(自身を含む): 42690240

約数和(自身を除く): 22033370

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 65, 85, 130, 169, 170, 221, 338, 442, 719, 845, 1105, 1438, 1690, 2210, 2873, 3595, 5746, 7190, 9347, 12223, 14365, 18694, 24446, 28730, 46735, 61115, 93470, 121511, 122230, 158899, 243022, 317798, 607555, 794495, 1215110, 1588990, 2065687, 4131374, 10328435, 20656870]

約数ペア:

[(1, 20656870), (2, 10328435), (5, 4131374), (10, 2065687), (13, 1588990), (17, 1215110), (26, 794495), (34, 607555), (65, 317798), (85, 243022), (130, 158899), (169, 122230), (170, 121511), (221, 93470), (338, 61115), (442, 46735), (719, 28730), (845, 24446), (1105, 18694), (1438, 14365), (1690, 12223), (2210, 9347), (2873, 7190), (3595, 5746)]