13218280

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:226

約数の個数: 64

約数和(自身を含む): 31104000

約数和(自身を除く): 17885720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 79, 89, 94, 158, 178, 188, 235, 316, 356, 376, 395, 445, 470, 632, 712, 790, 890, 940, 1580, 1780, 1880, 3160, 3560, 3713, 4183, 7031, 7426, 8366, 14062, 14852, 16732, 18565, 20915, 28124, 29704, 33464, 35155, 37130, 41830, 56248, 70310, 74260, 83660, 140620, 148520, 167320, 281240, 330457, 660914, 1321828, 1652285, 2643656, 3304570, 6609140, 13218280]

約数ペア:

[(1, 13218280), (2, 6609140), (4, 3304570), (5, 2643656), (8, 1652285), (10, 1321828), (20, 660914), (40, 330457), (47, 281240), (79, 167320), (89, 148520), (94, 140620), (158, 83660), (178, 74260), (188, 70310), (235, 56248), (316, 41830), (356, 37130), (376, 35155), (395, 33464), (445, 29704), (470, 28124), (632, 20915), (712, 18565), (790, 16732), (890, 14852), (940, 14062), (1580, 8366), (1780, 7426), (1880, 7031), (3160, 4183), (3560, 3713)]