20157813

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{457}}^1$

素因数の和:518

約数の個数: 36

約数和(自身を含む): 32687460

約数和(自身を除く): 12529647

約数列:

[1, 3, 9, 13, 29, 39, 87, 117, 169, 261, 377, 457, 507, 1131, 1371, 1521, 3393, 4113, 4901, 5941, 13253, 14703, 17823, 39759, 44109, 53469, 77233, 119277, 172289, 231699, 516867, 695097, 1550601, 2239757, 6719271, 20157813]

約数ペア:

[(1, 20157813), (3, 6719271), (9, 2239757), (13, 1550601), (29, 695097), (39, 516867), (87, 231699), (117, 172289), (169, 119277), (261, 77233), (377, 53469), (457, 44109), (507, 39759), (1131, 17823), (1371, 14703), (1521, 13253), (3393, 5941), (4113, 4901)]