21090900

素因数分解:

$2^2\times 3^1\times 5^2\times {\mathrm{229}}^1\times {\mathrm{307}}^1$

素因数の和:553

約数の個数: 72

約数和(自身を含む): 61489120

約数和(自身を除く): 40398220

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 25, 30, 50, 60, 75, 100, 150, 229, 300, 307, 458, 614, 687, 916, 921, 1145, 1228, 1374, 1535, 1842, 2290, 2748, 3070, 3435, 3684, 4580, 4605, 5725, 6140, 6870, 7675, 9210, 11450, 13740, 15350, 17175, 18420, 22900, 23025, 30700, 34350, 46050, 68700, 70303, 92100, 140606, 210909, 281212, 351515, 421818, 703030, 843636, 1054545, 1406060, 1757575, 2109090, 3515150, 4218180, 5272725, 7030300, 10545450, 21090900]

約数ペア:

[(1, 21090900), (2, 10545450), (3, 7030300), (4, 5272725), (5, 4218180), (6, 3515150), (10, 2109090), (12, 1757575), (15, 1406060), (20, 1054545), (25, 843636), (30, 703030), (50, 421818), (60, 351515), (75, 281212), (100, 210909), (150, 140606), (229, 92100), (300, 70303), (307, 68700), (458, 46050), (614, 34350), (687, 30700), (916, 23025), (921, 22900), (1145, 18420), (1228, 17175), (1374, 15350), (1535, 13740), (1842, 11450), (2290, 9210), (2748, 7675), (3070, 6870), (3435, 6140), (3684, 5725), (4580, 4605)]