21784735

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1$

素因数の和:136

約数の個数: 64

約数和(自身を含む): 34836480

約数和(自身を除く): 13051745

約数列:

[1, 5, 7, 17, 19, 35, 41, 47, 85, 95, 119, 133, 205, 235, 287, 323, 329, 595, 665, 697, 779, 799, 893, 1435, 1615, 1645, 1927, 2261, 3485, 3895, 3995, 4465, 4879, 5453, 5593, 6251, 9635, 11305, 13243, 13489, 15181, 24395, 27265, 27965, 31255, 32759, 36613, 66215, 67445, 75905, 92701, 106267, 163795, 183065, 229313, 256291, 463505, 531335, 622421, 1146565, 1281455, 3112105, 4356947, 21784735]

約数ペア:

[(1, 21784735), (5, 4356947), (7, 3112105), (17, 1281455), (19, 1146565), (35, 622421), (41, 531335), (47, 463505), (85, 256291), (95, 229313), (119, 183065), (133, 163795), (205, 106267), (235, 92701), (287, 75905), (323, 67445), (329, 66215), (595, 36613), (665, 32759), (697, 31255), (779, 27965), (799, 27265), (893, 24395), (1435, 15181), (1615, 13489), (1645, 13243), (1927, 11305), (2261, 9635), (3485, 6251), (3895, 5593), (3995, 5453), (4465, 4879)]