21285778

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{4703}}^1$

素因数の和:4809

約数の個数: 16

約数和(自身を含む): 33417216

約数和(自身を除く): 12131438

約数列:

[1, 2, 31, 62, 73, 146, 2263, 4526, 4703, 9406, 145793, 291586, 343319, 686638, 10642889, 21285778]

約数ペア:

[(1, 21285778), (2, 10642889), (31, 686638), (62, 343319), (73, 291586), (146, 145793), (2263, 9406), (4526, 4703)]