21090710

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{1279}}^1$

素因数の和:1400

約数の個数: 32

約数和(自身を含む): 40642560

約数和(自身を除く): 19551850

約数列:

[1, 2, 5, 10, 17, 34, 85, 97, 170, 194, 485, 970, 1279, 1649, 2558, 3298, 6395, 8245, 12790, 16490, 21743, 43486, 108715, 124063, 217430, 248126, 620315, 1240630, 2109071, 4218142, 10545355, 21090710]

約数ペア:

[(1, 21090710), (2, 10545355), (5, 4218142), (10, 2109071), (17, 1240630), (34, 620315), (85, 248126), (97, 217430), (170, 124063), (194, 108715), (485, 43486), (970, 21743), (1279, 16490), (1649, 12790), (2558, 8245), (3298, 6395)]