21558278

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{239}}^1\times {\mathrm{379}}^1$

素因数の和:644

約数の個数: 32

約数和(自身を含む): 39398400

約数和(自身を除く): 17840122

約数列:

[1, 2, 7, 14, 17, 34, 119, 238, 239, 379, 478, 758, 1673, 2653, 3346, 4063, 5306, 6443, 8126, 12886, 28441, 45101, 56882, 90202, 90581, 181162, 634067, 1268134, 1539877, 3079754, 10779139, 21558278]

約数ペア:

[(1, 21558278), (2, 10779139), (7, 3079754), (14, 1539877), (17, 1268134), (34, 634067), (119, 181162), (238, 90581), (239, 90202), (379, 56882), (478, 45101), (758, 28441), (1673, 12886), (2653, 8126), (3346, 6443), (4063, 5306)]