20503180

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1\times {\mathrm{269}}^1$

素因数の和:418

約数の個数: 48

約数和(自身を含む): 44815680

約数和(自身を除く): 24312500

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 103, 148, 185, 206, 269, 370, 412, 515, 538, 740, 1030, 1076, 1345, 2060, 2690, 3811, 5380, 7622, 9953, 15244, 19055, 19906, 27707, 38110, 39812, 49765, 55414, 76220, 99530, 110828, 138535, 199060, 277070, 554140, 1025159, 2050318, 4100636, 5125795, 10251590, 20503180]

約数ペア:

[(1, 20503180), (2, 10251590), (4, 5125795), (5, 4100636), (10, 2050318), (20, 1025159), (37, 554140), (74, 277070), (103, 199060), (148, 138535), (185, 110828), (206, 99530), (269, 76220), (370, 55414), (412, 49765), (515, 39812), (538, 38110), (740, 27707), (1030, 19906), (1076, 19055), (1345, 15244), (2060, 9953), (2690, 7622), (3811, 5380)]