19811715

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1009}}^1$

素因数の和:1052

約数の個数: 64

約数和(自身を含む): 41886720

約数和(自身を除く): 22075005

約数列:

[1, 3, 5, 7, 11, 15, 17, 21, 33, 35, 51, 55, 77, 85, 105, 119, 165, 187, 231, 255, 357, 385, 561, 595, 935, 1009, 1155, 1309, 1785, 2805, 3027, 3927, 5045, 6545, 7063, 11099, 15135, 17153, 19635, 21189, 33297, 35315, 51459, 55495, 77693, 85765, 105945, 120071, 166485, 188683, 233079, 257295, 360213, 388465, 566049, 600355, 943415, 1165395, 1320781, 1801065, 2830245, 3962343, 6603905, 19811715]

約数ペア:

[(1, 19811715), (3, 6603905), (5, 3962343), (7, 2830245), (11, 1801065), (15, 1320781), (17, 1165395), (21, 943415), (33, 600355), (35, 566049), (51, 388465), (55, 360213), (77, 257295), (85, 233079), (105, 188683), (119, 166485), (165, 120071), (187, 105945), (231, 85765), (255, 77693), (357, 55495), (385, 51459), (561, 35315), (595, 33297), (935, 21189), (1009, 19635), (1155, 17153), (1309, 15135), (1785, 11099), (2805, 7063), (3027, 6545), (3927, 5045)]