21895839

素因数分解:

$3^4\times 7^1\times {\mathrm{23}}^2\times {\mathrm{73}}^1$

素因数の和:138

約数の個数: 60

約数和(自身を含む): 39612496

約数和(自身を除く): 17716657

約数列:

[1, 3, 7, 9, 21, 23, 27, 63, 69, 73, 81, 161, 189, 207, 219, 483, 511, 529, 567, 621, 657, 1449, 1533, 1587, 1679, 1863, 1971, 3703, 4347, 4599, 4761, 5037, 5913, 11109, 11753, 13041, 13797, 14283, 15111, 33327, 35259, 38617, 41391, 42849, 45333, 99981, 105777, 115851, 135999, 270319, 299943, 317331, 347553, 810957, 951993, 1042659, 2432871, 3127977, 7298613, 21895839]

約数ペア:

[(1, 21895839), (3, 7298613), (7, 3127977), (9, 2432871), (21, 1042659), (23, 951993), (27, 810957), (63, 347553), (69, 317331), (73, 299943), (81, 270319), (161, 135999), (189, 115851), (207, 105777), (219, 99981), (483, 45333), (511, 42849), (529, 41391), (567, 38617), (621, 35259), (657, 33327), (1449, 15111), (1533, 14283), (1587, 13797), (1679, 13041), (1863, 11753), (1971, 11109), (3703, 5913), (4347, 5037), (4599, 4761)]