20341780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{269}}^1$

素因数の和:496

約数の個数: 48

約数和(自身を含む): 45360000

約数和(自身を除く): 25018220

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 199, 269, 380, 398, 538, 796, 995, 1076, 1345, 1990, 2690, 3781, 3980, 5111, 5380, 7562, 10222, 15124, 18905, 20444, 25555, 37810, 51110, 53531, 75620, 102220, 107062, 214124, 267655, 535310, 1017089, 1070620, 2034178, 4068356, 5085445, 10170890, 20341780]

約数ペア:

[(1, 20341780), (2, 10170890), (4, 5085445), (5, 4068356), (10, 2034178), (19, 1070620), (20, 1017089), (38, 535310), (76, 267655), (95, 214124), (190, 107062), (199, 102220), (269, 75620), (380, 53531), (398, 51110), (538, 37810), (796, 25555), (995, 20444), (1076, 18905), (1345, 15124), (1990, 10222), (2690, 7562), (3781, 5380), (3980, 5111)]