21195405

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{2039}}^1$

素因数の和:2071

約数の個数: 64

約数和(自身を含む): 47001600

約数和(自身を除く): 25806195

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 27, 33, 35, 45, 55, 63, 77, 99, 105, 135, 165, 189, 231, 297, 315, 385, 495, 693, 945, 1155, 1485, 2039, 2079, 3465, 6117, 10195, 10395, 14273, 18351, 22429, 30585, 42819, 55053, 67287, 71365, 91755, 112145, 128457, 157003, 201861, 214095, 275265, 336435, 385371, 471009, 605583, 642285, 785015, 1009305, 1413027, 1926855, 2355045, 3027915, 4239081, 7065135, 21195405]

約数ペア:

[(1, 21195405), (3, 7065135), (5, 4239081), (7, 3027915), (9, 2355045), (11, 1926855), (15, 1413027), (21, 1009305), (27, 785015), (33, 642285), (35, 605583), (45, 471009), (55, 385371), (63, 336435), (77, 275265), (99, 214095), (105, 201861), (135, 157003), (165, 128457), (189, 112145), (231, 91755), (297, 71365), (315, 67287), (385, 55053), (495, 42819), (693, 30585), (945, 22429), (1155, 18351), (1485, 14273), (2039, 10395), (2079, 10195), (3465, 6117)]