20621380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{6101}}^1$

素因数の和:6136

約数の個数: 36

約数和(自身を含む): 46899972

約数和(自身を除く): 26278592

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 6101, 12202, 24404, 30505, 61010, 79313, 122020, 158626, 317252, 396565, 793130, 1031069, 1586260, 2062138, 4124276, 5155345, 10310690, 20621380]

約数ペア:

[(1, 20621380), (2, 10310690), (4, 5155345), (5, 4124276), (10, 2062138), (13, 1586260), (20, 1031069), (26, 793130), (52, 396565), (65, 317252), (130, 158626), (169, 122020), (260, 79313), (338, 61010), (676, 30505), (845, 24404), (1690, 12202), (3380, 6101)]