19917772

素因数分解:

$2^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{233}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 41513472

約数和(自身を除く): 21595700

約数列:

[1, 2, 4, 7, 14, 28, 43, 71, 86, 142, 172, 233, 284, 301, 466, 497, 602, 932, 994, 1204, 1631, 1988, 3053, 3262, 6106, 6524, 10019, 12212, 16543, 20038, 21371, 33086, 40076, 42742, 66172, 70133, 85484, 115801, 140266, 231602, 280532, 463204, 711349, 1422698, 2845396, 4979443, 9958886, 19917772]

約数ペア:

[(1, 19917772), (2, 9958886), (4, 4979443), (7, 2845396), (14, 1422698), (28, 711349), (43, 463204), (71, 280532), (86, 231602), (142, 140266), (172, 115801), (233, 85484), (284, 70133), (301, 66172), (466, 42742), (497, 40076), (602, 33086), (932, 21371), (994, 20038), (1204, 16543), (1631, 12212), (1988, 10019), (3053, 6524), (3262, 6106)]