21660990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{55541}}^1$

素因数の和:55564

約数の個数: 32

約数和(自身を含む): 55986336

約数和(自身を除く): 34325346

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 55541, 111082, 166623, 277705, 333246, 555410, 722033, 833115, 1444066, 1666230, 2166099, 3610165, 4332198, 7220330, 10830495, 21660990]

約数ペア:

[(1, 21660990), (2, 10830495), (3, 7220330), (5, 4332198), (6, 3610165), (10, 2166099), (13, 1666230), (15, 1444066), (26, 833115), (30, 722033), (39, 555410), (65, 333246), (78, 277705), (130, 166623), (195, 111082), (390, 55541)]