21374015

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^2$

素因数の和:116

約数の個数: 48

約数和(自身を含む): 31606848

約数和(自身を除く): 10232833

約数列:

[1, 5, 13, 17, 23, 29, 65, 85, 115, 145, 221, 299, 377, 391, 493, 667, 841, 1105, 1495, 1885, 1955, 2465, 3335, 4205, 5083, 6409, 8671, 10933, 11339, 14297, 19343, 25415, 32045, 43355, 54665, 56695, 71485, 96715, 147407, 185861, 251459, 328831, 737035, 929305, 1257295, 1644155, 4274803, 21374015]

約数ペア:

[(1, 21374015), (5, 4274803), (13, 1644155), (17, 1257295), (23, 929305), (29, 737035), (65, 328831), (85, 251459), (115, 185861), (145, 147407), (221, 96715), (299, 71485), (377, 56695), (391, 54665), (493, 43355), (667, 32045), (841, 25415), (1105, 19343), (1495, 14297), (1885, 11339), (1955, 10933), (2465, 8671), (3335, 6409), (4205, 5083)]