21315411

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^2$

素因数の和:220

約数の個数: 36

約数和(自身を含む): 34992048

約数和(自身を除く): 13676637

約数列:

[1, 3, 9, 13, 23, 39, 69, 89, 117, 207, 267, 299, 801, 897, 1157, 2047, 2691, 3471, 6141, 7921, 10413, 18423, 23763, 26611, 71289, 79833, 102973, 182183, 239499, 308919, 546549, 926757, 1639647, 2368379, 7105137, 21315411]

約数ペア:

[(1, 21315411), (3, 7105137), (9, 2368379), (13, 1639647), (23, 926757), (39, 546549), (69, 308919), (89, 239499), (117, 182183), (207, 102973), (267, 79833), (299, 71289), (801, 26611), (897, 23763), (1157, 18423), (2047, 10413), (2691, 7921), (3471, 6141)]