20321775

素因数分解:

$3^2\times 5^2\times {\mathrm{181}}^1\times {\mathrm{499}}^1$

素因数の和:696

約数の個数: 36

約数和(自身を含む): 36673000

約数和(自身を除く): 16351225

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 181, 225, 499, 543, 905, 1497, 1629, 2495, 2715, 4491, 4525, 7485, 8145, 12475, 13575, 22455, 37425, 40725, 90319, 112275, 270957, 451595, 812871, 1354785, 2257975, 4064355, 6773925, 20321775]

約数ペア:

[(1, 20321775), (3, 6773925), (5, 4064355), (9, 2257975), (15, 1354785), (25, 812871), (45, 451595), (75, 270957), (181, 112275), (225, 90319), (499, 40725), (543, 37425), (905, 22455), (1497, 13575), (1629, 12475), (2495, 8145), (2715, 7485), (4491, 4525)]