21890180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{1427}}^1$

素因数の和:1508

約数の個数: 48

約数和(自身を含む): 50379840

約数和(自身を除く): 28489660

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 59, 65, 118, 130, 236, 260, 295, 590, 767, 1180, 1427, 1534, 2854, 3068, 3835, 5708, 7135, 7670, 14270, 15340, 18551, 28540, 37102, 74204, 84193, 92755, 168386, 185510, 336772, 371020, 420965, 841930, 1094509, 1683860, 2189018, 4378036, 5472545, 10945090, 21890180]

約数ペア:

[(1, 21890180), (2, 10945090), (4, 5472545), (5, 4378036), (10, 2189018), (13, 1683860), (20, 1094509), (26, 841930), (52, 420965), (59, 371020), (65, 336772), (118, 185510), (130, 168386), (236, 92755), (260, 84193), (295, 74204), (590, 37102), (767, 28540), (1180, 18551), (1427, 15340), (1534, 14270), (2854, 7670), (3068, 7135), (3835, 5708)]