21690915

素因数分解:

$3^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{113}}^1\times {\mathrm{191}}^1$

素因数の和:379

約数の個数: 32

約数和(自身を含む): 35721216

約数和(自身を除く): 14030301

約数列:

[1, 3, 5, 15, 67, 113, 191, 201, 335, 339, 565, 573, 955, 1005, 1695, 2865, 7571, 12797, 21583, 22713, 37855, 38391, 63985, 64749, 107915, 113565, 191955, 323745, 1446061, 4338183, 7230305, 21690915]

約数ペア:

[(1, 21690915), (3, 7230305), (5, 4338183), (15, 1446061), (67, 323745), (113, 191955), (191, 113565), (201, 107915), (335, 64749), (339, 63985), (565, 38391), (573, 37855), (955, 22713), (1005, 21583), (1695, 12797), (2865, 7571)]