18995920

素因数分解:

$2^4\times 5^1\times {\mathrm{367}}^1\times {\mathrm{647}}^1$

素因数の和:1027

約数の個数: 40

約数和(自身を含む): 44354304

約数和(自身を除く): 25358384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 367, 647, 734, 1294, 1468, 1835, 2588, 2936, 3235, 3670, 5176, 5872, 6470, 7340, 10352, 12940, 14680, 25880, 29360, 51760, 237449, 474898, 949796, 1187245, 1899592, 2374490, 3799184, 4748980, 9497960, 18995920]

約数ペア:

[(1, 18995920), (2, 9497960), (4, 4748980), (5, 3799184), (8, 2374490), (10, 1899592), (16, 1187245), (20, 949796), (40, 474898), (80, 237449), (367, 51760), (647, 29360), (734, 25880), (1294, 14680), (1468, 12940), (1835, 10352), (2588, 7340), (2936, 6470), (3235, 5872), (3670, 5176)]