21151420

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1\times {\mathrm{283}}^1$

素因数の和:430

約数の個数: 48

約数和(自身を含む): 46232928

約数和(自身を除く): 25081508

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 101, 148, 185, 202, 283, 370, 404, 505, 566, 740, 1010, 1132, 1415, 2020, 2830, 3737, 5660, 7474, 10471, 14948, 18685, 20942, 28583, 37370, 41884, 52355, 57166, 74740, 104710, 114332, 142915, 209420, 285830, 571660, 1057571, 2115142, 4230284, 5287855, 10575710, 21151420]

約数ペア:

[(1, 21151420), (2, 10575710), (4, 5287855), (5, 4230284), (10, 2115142), (20, 1057571), (37, 571660), (74, 285830), (101, 209420), (148, 142915), (185, 114332), (202, 104710), (283, 74740), (370, 57166), (404, 52355), (505, 41884), (566, 37370), (740, 28583), (1010, 20942), (1132, 18685), (1415, 14948), (2020, 10471), (2830, 7474), (3737, 5660)]