21294400

素因数分解:

$2^6\times 5^2\times {\mathrm{13309}}^1$

素因数の和:13331

約数の個数: 42

約数和(自身を含む): 52401470

約数和(自身を除く): 31107070

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 320, 400, 800, 1600, 13309, 26618, 53236, 66545, 106472, 133090, 212944, 266180, 332725, 425888, 532360, 665450, 851776, 1064720, 1330900, 2129440, 2661800, 4258880, 5323600, 10647200, 21294400]

約数ペア:

[(1, 21294400), (2, 10647200), (4, 5323600), (5, 4258880), (8, 2661800), (10, 2129440), (16, 1330900), (20, 1064720), (25, 851776), (32, 665450), (40, 532360), (50, 425888), (64, 332725), (80, 266180), (100, 212944), (160, 133090), (200, 106472), (320, 66545), (400, 53236), (800, 26618), (1600, 13309)]