21388900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{16453}}^1$

素因数の和:16480

約数の個数: 36

約数和(自身を含む): 49987252

約数和(自身を除く): 28598352

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 650, 1300, 16453, 32906, 65812, 82265, 164530, 213889, 329060, 411325, 427778, 822650, 855556, 1069445, 1645300, 2138890, 4277780, 5347225, 10694450, 21388900]

約数ペア:

[(1, 21388900), (2, 10694450), (4, 5347225), (5, 4277780), (10, 2138890), (13, 1645300), (20, 1069445), (25, 855556), (26, 822650), (50, 427778), (52, 411325), (65, 329060), (100, 213889), (130, 164530), (260, 82265), (325, 65812), (650, 32906), (1300, 16453)]