18907160

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{113}}^1$

素因数の和:260

約数の個数: 64

約数和(自身を含む): 44323200

約数和(自身を除く): 25416040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 89, 94, 113, 178, 188, 226, 235, 356, 376, 445, 452, 470, 565, 712, 890, 904, 940, 1130, 1780, 1880, 2260, 3560, 4183, 4520, 5311, 8366, 10057, 10622, 16732, 20114, 20915, 21244, 26555, 33464, 40228, 41830, 42488, 50285, 53110, 80456, 83660, 100570, 106220, 167320, 201140, 212440, 402280, 472679, 945358, 1890716, 2363395, 3781432, 4726790, 9453580, 18907160]

約数ペア:

[(1, 18907160), (2, 9453580), (4, 4726790), (5, 3781432), (8, 2363395), (10, 1890716), (20, 945358), (40, 472679), (47, 402280), (89, 212440), (94, 201140), (113, 167320), (178, 106220), (188, 100570), (226, 83660), (235, 80456), (356, 53110), (376, 50285), (445, 42488), (452, 41830), (470, 40228), (565, 33464), (712, 26555), (890, 21244), (904, 20915), (940, 20114), (1130, 16732), (1780, 10622), (1880, 10057), (2260, 8366), (3560, 5311), (4183, 4520)]