21729880

素因数分解:

$2^3\times 5^1\times {\mathrm{239}}^1\times {\mathrm{2273}}^1$

素因数の和:2523

約数の個数: 32

約数和(自身を含む): 49118400

約数和(自身を除く): 27388520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 239, 478, 956, 1195, 1912, 2273, 2390, 4546, 4780, 9092, 9560, 11365, 18184, 22730, 45460, 90920, 543247, 1086494, 2172988, 2716235, 4345976, 5432470, 10864940, 21729880]

約数ペア:

[(1, 21729880), (2, 10864940), (4, 5432470), (5, 4345976), (8, 2716235), (10, 2172988), (20, 1086494), (40, 543247), (239, 90920), (478, 45460), (956, 22730), (1195, 18184), (1912, 11365), (2273, 9560), (2390, 9092), (4546, 4780)]