81719565

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:210

約数の個数: 64

約数和(自身を含む): 142467072

約数和(自身を除く): 60747507

約数列:

[1, 3, 5, 15, 31, 43, 61, 67, 93, 129, 155, 183, 201, 215, 305, 335, 465, 645, 915, 1005, 1333, 1891, 2077, 2623, 2881, 3999, 4087, 5673, 6231, 6665, 7869, 8643, 9455, 10385, 12261, 13115, 14405, 19995, 20435, 28365, 31155, 39345, 43215, 61305, 81313, 89311, 126697, 175741, 243939, 267933, 380091, 406565, 446555, 527223, 633485, 878705, 1219695, 1339665, 1900455, 2636115, 5447971, 16343913, 27239855, 81719565]

約数ペア:

[(1, 81719565), (3, 27239855), (5, 16343913), (15, 5447971), (31, 2636115), (43, 1900455), (61, 1339665), (67, 1219695), (93, 878705), (129, 633485), (155, 527223), (183, 446555), (201, 406565), (215, 380091), (305, 267933), (335, 243939), (465, 175741), (645, 126697), (915, 89311), (1005, 81313), (1333, 61305), (1891, 43215), (2077, 39345), (2623, 31155), (2881, 28365), (3999, 20435), (4087, 19995), (5673, 14405), (6231, 13115), (6665, 12261), (7869, 10385), (8643, 9455)]