20471408

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{277}}^1$

素因数の和:465

約数の個数: 40

約数和(自身を含む): 41366400

約数和(自身を除く): 20894992

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 149, 248, 277, 298, 496, 554, 596, 1108, 1192, 2216, 2384, 4432, 4619, 8587, 9238, 17174, 18476, 34348, 36952, 41273, 68696, 73904, 82546, 137392, 165092, 330184, 660368, 1279463, 2558926, 5117852, 10235704, 20471408]

約数ペア:

[(1, 20471408), (2, 10235704), (4, 5117852), (8, 2558926), (16, 1279463), (31, 660368), (62, 330184), (124, 165092), (149, 137392), (248, 82546), (277, 73904), (298, 68696), (496, 41273), (554, 36952), (596, 34348), (1108, 18476), (1192, 17174), (2216, 9238), (2384, 8587), (4432, 4619)]