20878641

素因数分解:

$3^4\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1601}}^1$

素因数の和:1643

約数の個数: 40

約数和(自身を含む): 37217664

約数和(自身を除く): 16339023

約数列:

[1, 3, 7, 9, 21, 23, 27, 63, 69, 81, 161, 189, 207, 483, 567, 621, 1449, 1601, 1863, 4347, 4803, 11207, 13041, 14409, 33621, 36823, 43227, 100863, 110469, 129681, 257761, 302589, 331407, 773283, 907767, 994221, 2319849, 2982663, 6959547, 20878641]

約数ペア:

[(1, 20878641), (3, 6959547), (7, 2982663), (9, 2319849), (21, 994221), (23, 907767), (27, 773283), (63, 331407), (69, 302589), (81, 257761), (161, 129681), (189, 110469), (207, 100863), (483, 43227), (567, 36823), (621, 33621), (1449, 14409), (1601, 13041), (1863, 11207), (4347, 4803)]