21282895

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{197}}^1$

素因数の和:291

約数の個数: 32

約数和(自身を含む): 28740096

約数和(自身を除く): 7457201

約数列:

[1, 5, 17, 31, 41, 85, 155, 197, 205, 527, 697, 985, 1271, 2635, 3349, 3485, 6107, 6355, 8077, 16745, 21607, 30535, 40385, 103819, 108035, 137309, 250387, 519095, 686545, 1251935, 4256579, 21282895]

約数ペア:

[(1, 21282895), (5, 4256579), (17, 1251935), (31, 686545), (41, 519095), (85, 250387), (155, 137309), (197, 108035), (205, 103819), (527, 40385), (697, 30535), (985, 21607), (1271, 16745), (2635, 8077), (3349, 6355), (3485, 6107)]