21698090

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{74821}}^1$

素因数の和:74857

約数の個数: 16

約数和(自身を含む): 40403880

約数和(自身を除く): 18705790

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 74821, 149642, 374105, 748210, 2169809, 4339618, 10849045, 21698090]

約数ペア:

[(1, 21698090), (2, 10849045), (5, 4339618), (10, 2169809), (29, 748210), (58, 374105), (145, 149642), (290, 74821)]