21255955

素因数分解:

$5^1\times 7^2\times {\mathrm{101}}^1\times {\mathrm{859}}^1$

素因数の和:979

約数の個数: 24

約数和(自身を含む): 30000240

約数和(自身を除く): 8744285

約数列:

[1, 5, 7, 35, 49, 101, 245, 505, 707, 859, 3535, 4295, 4949, 6013, 24745, 30065, 42091, 86759, 210455, 433795, 607313, 3036565, 4251191, 21255955]

約数ペア:

[(1, 21255955), (5, 4251191), (7, 3036565), (35, 607313), (49, 433795), (101, 210455), (245, 86759), (505, 42091), (707, 30065), (859, 24745), (3535, 6013), (4295, 4949)]