21179900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{383}}^1$

素因数の和:483

約数の個数: 72

約数和(自身を含む): 53329920

約数和(自身を除く): 32150020

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 79, 100, 140, 158, 175, 316, 350, 383, 395, 553, 700, 766, 790, 1106, 1532, 1580, 1915, 1975, 2212, 2681, 2765, 3830, 3950, 5362, 5530, 7660, 7900, 9575, 10724, 11060, 13405, 13825, 19150, 26810, 27650, 30257, 38300, 53620, 55300, 60514, 67025, 121028, 134050, 151285, 211799, 268100, 302570, 423598, 605140, 756425, 847196, 1058995, 1512850, 2117990, 3025700, 4235980, 5294975, 10589950, 21179900]

約数ペア:

[(1, 21179900), (2, 10589950), (4, 5294975), (5, 4235980), (7, 3025700), (10, 2117990), (14, 1512850), (20, 1058995), (25, 847196), (28, 756425), (35, 605140), (50, 423598), (70, 302570), (79, 268100), (100, 211799), (140, 151285), (158, 134050), (175, 121028), (316, 67025), (350, 60514), (383, 55300), (395, 53620), (553, 38300), (700, 30257), (766, 27650), (790, 26810), (1106, 19150), (1532, 13825), (1580, 13405), (1915, 11060), (1975, 10724), (2212, 9575), (2681, 7900), (2765, 7660), (3830, 5530), (3950, 5362)]