28187720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{64063}}^1$

素因数の和:64085

約数の個数: 32

約数和(自身を含む): 69189120

約数和(自身を除く): 41001400

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 64063, 128126, 256252, 320315, 512504, 640630, 704693, 1281260, 1409386, 2562520, 2818772, 3523465, 5637544, 7046930, 14093860, 28187720]

約数ペア:

[(1, 28187720), (2, 14093860), (4, 7046930), (5, 5637544), (8, 3523465), (10, 2818772), (11, 2562520), (20, 1409386), (22, 1281260), (40, 704693), (44, 640630), (55, 512504), (88, 320315), (110, 256252), (220, 128126), (440, 64063)]