19881392

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{30307}}^1$

素因数の和:30356

約数の個数: 20

約数和(自身を含む): 39461016

約数和(自身を除く): 19579624

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 328, 656, 30307, 60614, 121228, 242456, 484912, 1242587, 2485174, 4970348, 9940696, 19881392]

約数ペア:

[(1, 19881392), (2, 9940696), (4, 4970348), (8, 2485174), (16, 1242587), (41, 484912), (82, 242456), (164, 121228), (328, 60614), (656, 30307)]