18782840

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{1171}}^1$

素因数の和:1583

約数の個数: 32

約数和(自身を含む): 42402960

約数和(自身を除く): 23620120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 802, 1171, 1604, 2005, 2342, 3208, 4010, 4684, 5855, 8020, 9368, 11710, 16040, 23420, 46840, 469571, 939142, 1878284, 2347855, 3756568, 4695710, 9391420, 18782840]

約数ペア:

[(1, 18782840), (2, 9391420), (4, 4695710), (5, 3756568), (8, 2347855), (10, 1878284), (20, 939142), (40, 469571), (401, 46840), (802, 23420), (1171, 16040), (1604, 11710), (2005, 9368), (2342, 8020), (3208, 5855), (4010, 4684)]