21256425

素因数分解:

$3^5\times 5^2\times {\mathrm{3499}}^1$

素因数の和:3524

約数の個数: 36

約数和(自身を含む): 39494000

約数和(自身を除く): 18237575

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 135, 225, 243, 405, 675, 1215, 2025, 3499, 6075, 10497, 17495, 31491, 52485, 87475, 94473, 157455, 262425, 283419, 472365, 787275, 850257, 1417095, 2361825, 4251285, 7085475, 21256425]

約数ペア:

[(1, 21256425), (3, 7085475), (5, 4251285), (9, 2361825), (15, 1417095), (25, 850257), (27, 787275), (45, 472365), (75, 283419), (81, 262425), (135, 157455), (225, 94473), (243, 87475), (405, 52485), (675, 31491), (1215, 17495), (2025, 10497), (3499, 6075)]