20820428

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{277}}^1$

素因数の和:366

約数の個数: 48

約数和(自身を含む): 41099520

約数和(自身を除く): 20279092

約数列:

[1, 2, 4, 19, 23, 38, 43, 46, 76, 86, 92, 172, 277, 437, 554, 817, 874, 989, 1108, 1634, 1748, 1978, 3268, 3956, 5263, 6371, 10526, 11911, 12742, 18791, 21052, 23822, 25484, 37582, 47644, 75164, 121049, 226309, 242098, 273953, 452618, 484196, 547906, 905236, 1095812, 5205107, 10410214, 20820428]

約数ペア:

[(1, 20820428), (2, 10410214), (4, 5205107), (19, 1095812), (23, 905236), (38, 547906), (43, 484196), (46, 452618), (76, 273953), (86, 242098), (92, 226309), (172, 121049), (277, 75164), (437, 47644), (554, 37582), (817, 25484), (874, 23822), (989, 21052), (1108, 18791), (1634, 12742), (1748, 11911), (1978, 10526), (3268, 6371), (3956, 5263)]