20394280

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{16447}}^1$

素因数の和:16489

約数の個数: 32

約数和(自身を含む): 47370240

約数和(自身を除く): 26975960

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 16447, 32894, 65788, 82235, 131576, 164470, 328940, 509857, 657880, 1019714, 2039428, 2549285, 4078856, 5098570, 10197140, 20394280]

約数ペア:

[(1, 20394280), (2, 10197140), (4, 5098570), (5, 4078856), (8, 2549285), (10, 2039428), (20, 1019714), (31, 657880), (40, 509857), (62, 328940), (124, 164470), (155, 131576), (248, 82235), (310, 65788), (620, 32894), (1240, 16447)]