19816550

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{709}}^1$

素因数の和:777

約数の個数: 48

約数和(自身を含む): 40674480

約数和(自身を除く): 20857930

約数列:

[1, 2, 5, 10, 13, 25, 26, 43, 50, 65, 86, 130, 215, 325, 430, 559, 650, 709, 1075, 1118, 1418, 2150, 2795, 3545, 5590, 7090, 9217, 13975, 17725, 18434, 27950, 30487, 35450, 46085, 60974, 92170, 152435, 230425, 304870, 396331, 460850, 762175, 792662, 1524350, 1981655, 3963310, 9908275, 19816550]

約数ペア:

[(1, 19816550), (2, 9908275), (5, 3963310), (10, 1981655), (13, 1524350), (25, 792662), (26, 762175), (43, 460850), (50, 396331), (65, 304870), (86, 230425), (130, 152435), (215, 92170), (325, 60974), (430, 46085), (559, 35450), (650, 30487), (709, 27950), (1075, 18434), (1118, 17725), (1418, 13975), (2150, 9217), (2795, 7090), (3545, 5590)]