21008660

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{419}}^1$

素因数の和:560

約数の個数: 48

約数和(自身を含む): 46569600

約数和(自身を除く): 25560940

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 109, 115, 218, 230, 419, 436, 460, 545, 838, 1090, 1676, 2095, 2180, 2507, 4190, 5014, 8380, 9637, 10028, 12535, 19274, 25070, 38548, 45671, 48185, 50140, 91342, 96370, 182684, 192740, 228355, 456710, 913420, 1050433, 2100866, 4201732, 5252165, 10504330, 21008660]

約数ペア:

[(1, 21008660), (2, 10504330), (4, 5252165), (5, 4201732), (10, 2100866), (20, 1050433), (23, 913420), (46, 456710), (92, 228355), (109, 192740), (115, 182684), (218, 96370), (230, 91342), (419, 50140), (436, 48185), (460, 45671), (545, 38548), (838, 25070), (1090, 19274), (1676, 12535), (2095, 10028), (2180, 9637), (2507, 8380), (4190, 5014)]