21559655

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{179}}^1$

素因数の和:323

約数の個数: 32

約数和(自身を含む): 29937600

約数和(自身を除く): 8377945

約数列:

[1, 5, 13, 17, 65, 85, 109, 179, 221, 545, 895, 1105, 1417, 1853, 2327, 3043, 7085, 9265, 11635, 15215, 19511, 24089, 39559, 97555, 120445, 197795, 253643, 331687, 1268215, 1658435, 4311931, 21559655]

約数ペア:

[(1, 21559655), (5, 4311931), (13, 1658435), (17, 1268215), (65, 331687), (85, 253643), (109, 197795), (179, 120445), (221, 97555), (545, 39559), (895, 24089), (1105, 19511), (1417, 15215), (1853, 11635), (2327, 9265), (3043, 7085)]