21021900

素因数分解:

$2^2\times 3^1\times 5^2\times {\mathrm{79}}^1\times {\mathrm{887}}^1$

素因数の和:983

約数の個数: 72

約数和(自身を含む): 61662720

約数和(自身を除く): 40640820

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, 887, 948, 1185, 1580, 1774, 1975, 2370, 2661, 3548, 3950, 4435, 4740, 5322, 5925, 7900, 8870, 10644, 11850, 13305, 17740, 22175, 23700, 26610, 44350, 53220, 66525, 70073, 88700, 133050, 140146, 210219, 266100, 280292, 350365, 420438, 700730, 840876, 1051095, 1401460, 1751825, 2102190, 3503650, 4204380, 5255475, 7007300, 10510950, 21021900]

約数ペア:

[(1, 21021900), (2, 10510950), (3, 7007300), (4, 5255475), (5, 4204380), (6, 3503650), (10, 2102190), (12, 1751825), (15, 1401460), (20, 1051095), (25, 840876), (30, 700730), (50, 420438), (60, 350365), (75, 280292), (79, 266100), (100, 210219), (150, 140146), (158, 133050), (237, 88700), (300, 70073), (316, 66525), (395, 53220), (474, 44350), (790, 26610), (887, 23700), (948, 22175), (1185, 17740), (1580, 13305), (1774, 11850), (1975, 10644), (2370, 8870), (2661, 7900), (3548, 5925), (3950, 5322), (4435, 4740)]