20421261

素因数分解:

$3^3\times 7^1\times {\mathrm{167}}^1\times {\mathrm{647}}^1$

素因数の和:830

約数の個数: 32

約数和(自身を含む): 34836480

約数和(自身を除く): 14415219

約数列:

[1, 3, 7, 9, 21, 27, 63, 167, 189, 501, 647, 1169, 1503, 1941, 3507, 4509, 4529, 5823, 10521, 13587, 17469, 31563, 40761, 108049, 122283, 324147, 756343, 972441, 2269029, 2917323, 6807087, 20421261]

約数ペア:

[(1, 20421261), (3, 6807087), (7, 2917323), (9, 2269029), (21, 972441), (27, 756343), (63, 324147), (167, 122283), (189, 108049), (501, 40761), (647, 31563), (1169, 17469), (1503, 13587), (1941, 10521), (3507, 5823), (4509, 4529)]