21118405

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2887}}^1$

素因数の和:2929

約数の個数: 32

約数和(自身を含む): 33269760

約数和(自身を除く): 12151355

約数列:

[1, 5, 7, 11, 19, 35, 55, 77, 95, 133, 209, 385, 665, 1045, 1463, 2887, 7315, 14435, 20209, 31757, 54853, 101045, 158785, 222299, 274265, 383971, 603383, 1111495, 1919855, 3016915, 4223681, 21118405]

約数ペア:

[(1, 21118405), (5, 4223681), (7, 3016915), (11, 1919855), (19, 1111495), (35, 603383), (55, 383971), (77, 274265), (95, 222299), (133, 158785), (209, 101045), (385, 54853), (665, 31757), (1045, 20209), (1463, 14435), (2887, 7315)]