18921000987

素因数分解:

$3^2\times 7^1\times {\mathrm{367}}^1\times {\mathrm{818347}}^1$

素因数の和:818727

約数の個数: 24

約数和(自身を含む): 31319814656

約数和(自身を除く): 12398813669

約数列:

[1, 3, 7, 9, 21, 63, 367, 1101, 2569, 3303, 7707, 23121, 818347, 2455041, 5728429, 7365123, 17185287, 51555861, 300333349, 901000047, 2102333443, 2703000141, 6307000329, 18921000987]

約数ペア:

[(1, 18921000987), (3, 6307000329), (7, 2703000141), (9, 2102333443), (21, 901000047), (63, 300333349), (367, 51555861), (1101, 17185287), (2569, 7365123), (3303, 5728429), (7707, 2455041), (23121, 818347)]