21174881

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{151}}^1$

素因数の和:261

約数の個数: 32

約数和(自身を含む): 27783168

約数和(自身を除く): 6608287

約数列:

[1, 7, 13, 23, 67, 91, 151, 161, 299, 469, 871, 1057, 1541, 1963, 2093, 3473, 6097, 10117, 10787, 13741, 20033, 24311, 45149, 70819, 131521, 140231, 232691, 316043, 920647, 1628837, 3024983, 21174881]

約数ペア:

[(1, 21174881), (7, 3024983), (13, 1628837), (23, 920647), (67, 316043), (91, 232691), (151, 140231), (161, 131521), (299, 70819), (469, 45149), (871, 24311), (1057, 20033), (1541, 13741), (1963, 10787), (2093, 10117), (3473, 6097)]