20355160

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{523}}^1$

素因数の和:680

約数の個数: 64

約数和(自身を含む): 52819200

約数和(自身を除く): 32464040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 139, 140, 278, 280, 523, 556, 695, 973, 1046, 1112, 1390, 1946, 2092, 2615, 2780, 3661, 3892, 4184, 4865, 5230, 5560, 7322, 7784, 9730, 10460, 14644, 18305, 19460, 20920, 29288, 36610, 38920, 72697, 73220, 145394, 146440, 290788, 363485, 508879, 581576, 726970, 1017758, 1453940, 2035516, 2544395, 2907880, 4071032, 5088790, 10177580, 20355160]

約数ペア:

[(1, 20355160), (2, 10177580), (4, 5088790), (5, 4071032), (7, 2907880), (8, 2544395), (10, 2035516), (14, 1453940), (20, 1017758), (28, 726970), (35, 581576), (40, 508879), (56, 363485), (70, 290788), (139, 146440), (140, 145394), (278, 73220), (280, 72697), (523, 38920), (556, 36610), (695, 29288), (973, 20920), (1046, 19460), (1112, 18305), (1390, 14644), (1946, 10460), (2092, 9730), (2615, 7784), (2780, 7322), (3661, 5560), (3892, 5230), (4184, 4865)]