21495900

素因数分解:

$2^2\times 3^1\times 5^2\times {\mathrm{79}}^1\times {\mathrm{907}}^1$

素因数の和:1003

約数の個数: 72

約数和(自身を含む): 63051520

約数和(自身を除く): 41555620

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 25, 30, 50, 60, 75, 79, 100, 150, 158, 237, 300, 316, 395, 474, 790, 907, 948, 1185, 1580, 1814, 1975, 2370, 2721, 3628, 3950, 4535, 4740, 5442, 5925, 7900, 9070, 10884, 11850, 13605, 18140, 22675, 23700, 27210, 45350, 54420, 68025, 71653, 90700, 136050, 143306, 214959, 272100, 286612, 358265, 429918, 716530, 859836, 1074795, 1433060, 1791325, 2149590, 3582650, 4299180, 5373975, 7165300, 10747950, 21495900]

約数ペア:

[(1, 21495900), (2, 10747950), (3, 7165300), (4, 5373975), (5, 4299180), (6, 3582650), (10, 2149590), (12, 1791325), (15, 1433060), (20, 1074795), (25, 859836), (30, 716530), (50, 429918), (60, 358265), (75, 286612), (79, 272100), (100, 214959), (150, 143306), (158, 136050), (237, 90700), (300, 71653), (316, 68025), (395, 54420), (474, 45350), (790, 27210), (907, 23700), (948, 22675), (1185, 18140), (1580, 13605), (1814, 11850), (1975, 10884), (2370, 9070), (2721, 7900), (3628, 5925), (3950, 5442), (4535, 4740)]