19661565

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{587}}^1$

素因数の和:642

約数の個数: 64

約数和(自身を含む): 40642560

約数和(自身を除く): 20980995

約数列:

[1, 3, 5, 7, 11, 15, 21, 29, 33, 35, 55, 77, 87, 105, 145, 165, 203, 231, 319, 385, 435, 587, 609, 957, 1015, 1155, 1595, 1761, 2233, 2935, 3045, 4109, 4785, 6457, 6699, 8805, 11165, 12327, 17023, 19371, 20545, 32285, 33495, 45199, 51069, 61635, 85115, 96855, 119161, 135597, 187253, 225995, 255345, 357483, 561759, 595805, 677985, 936265, 1310771, 1787415, 2808795, 3932313, 6553855, 19661565]

約数ペア:

[(1, 19661565), (3, 6553855), (5, 3932313), (7, 2808795), (11, 1787415), (15, 1310771), (21, 936265), (29, 677985), (33, 595805), (35, 561759), (55, 357483), (77, 255345), (87, 225995), (105, 187253), (145, 135597), (165, 119161), (203, 96855), (231, 85115), (319, 61635), (385, 51069), (435, 45199), (587, 33495), (609, 32285), (957, 20545), (1015, 19371), (1155, 17023), (1595, 12327), (1761, 11165), (2233, 8805), (2935, 6699), (3045, 6457), (4109, 4785)]