21920565

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1$

素因数の和:162

約数の個数: 64

約数和(自身を含む): 39813120

約数和(自身を除く): 17892555

約数列:

[1, 3, 5, 15, 17, 31, 47, 51, 59, 85, 93, 141, 155, 177, 235, 255, 295, 465, 527, 705, 799, 885, 1003, 1457, 1581, 1829, 2397, 2635, 2773, 3009, 3995, 4371, 5015, 5487, 7285, 7905, 8319, 9145, 11985, 13865, 15045, 21855, 24769, 27435, 31093, 41595, 47141, 74307, 85963, 93279, 123845, 141423, 155465, 235705, 257889, 371535, 429815, 466395, 707115, 1289445, 1461371, 4384113, 7306855, 21920565]

約数ペア:

[(1, 21920565), (3, 7306855), (5, 4384113), (15, 1461371), (17, 1289445), (31, 707115), (47, 466395), (51, 429815), (59, 371535), (85, 257889), (93, 235705), (141, 155465), (155, 141423), (177, 123845), (235, 93279), (255, 85963), (295, 74307), (465, 47141), (527, 41595), (705, 31093), (799, 27435), (885, 24769), (1003, 21855), (1457, 15045), (1581, 13865), (1829, 11985), (2397, 9145), (2635, 8319), (2773, 7905), (3009, 7285), (3995, 5487), (4371, 5015)]