202920980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{128431}}^1$

素因数の和:128519

約数の個数: 24

約数和(自身を含む): 431531520

約数和(自身を除く): 228610540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 128431, 256862, 513724, 642155, 1284310, 2568620, 10146049, 20292098, 40584196, 50730245, 101460490, 202920980]

約数ペア:

[(1, 202920980), (2, 101460490), (4, 50730245), (5, 40584196), (10, 20292098), (20, 10146049), (79, 2568620), (158, 1284310), (316, 642155), (395, 513724), (790, 256862), (1580, 128431)]