21560996

素因数分解:

$2^2\times {\mathrm{31}}^2\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:216

約数の個数: 36

約数和(自身を含む): 40037760

約数和(自身を除く): 18476764

約数列:

[1, 2, 4, 31, 62, 71, 79, 124, 142, 158, 284, 316, 961, 1922, 2201, 2449, 3844, 4402, 4898, 5609, 8804, 9796, 11218, 22436, 68231, 75919, 136462, 151838, 173879, 272924, 303676, 347758, 695516, 5390249, 10780498, 21560996]

約数ペア:

[(1, 21560996), (2, 10780498), (4, 5390249), (31, 695516), (62, 347758), (71, 303676), (79, 272924), (124, 173879), (142, 151838), (158, 136462), (284, 75919), (316, 68231), (961, 22436), (1922, 11218), (2201, 9796), (2449, 8804), (3844, 5609), (4402, 4898)]