19895990

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{19699}}^1$

素因数の和:19807

約数の個数: 16

約数和(自身を含む): 36169200

約数和(自身を除く): 16273210

約数列:

[1, 2, 5, 10, 101, 202, 505, 1010, 19699, 39398, 98495, 196990, 1989599, 3979198, 9947995, 19895990]

約数ペア:

[(1, 19895990), (2, 9947995), (5, 3979198), (10, 1989599), (101, 196990), (202, 98495), (505, 39398), (1010, 19699)]