21238156779

素因数分解:

$3^1\times 7^2\times {\mathrm{367}}^1\times {\mathrm{393671}}^1$

素因数の和:394055

約数の個数: 24

約数和(自身を含む): 33030655488

約数和(自身を除く): 11792498709

約数列:

[1, 3, 7, 21, 49, 147, 367, 1101, 2569, 7707, 17983, 53949, 393671, 1181013, 2755697, 8267091, 19289879, 57869637, 144477257, 433431771, 1011340799, 3034022397, 7079385593, 21238156779]

約数ペア:

[(1, 21238156779), (3, 7079385593), (7, 3034022397), (21, 1011340799), (49, 433431771), (147, 144477257), (367, 57869637), (1101, 19289879), (2569, 8267091), (7707, 2755697), (17983, 1181013), (53949, 393671)]