21245625

素因数分解:

$3^3\times 5^4\times {\mathrm{1259}}^1$

素因数の和:1288

約数の個数: 40

約数和(自身を含む): 39362400

約数和(自身を除く): 18116775

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 125, 135, 225, 375, 625, 675, 1125, 1259, 1875, 3375, 3777, 5625, 6295, 11331, 16875, 18885, 31475, 33993, 56655, 94425, 157375, 169965, 283275, 472125, 786875, 849825, 1416375, 2360625, 4249125, 7081875, 21245625]

約数ペア:

[(1, 21245625), (3, 7081875), (5, 4249125), (9, 2360625), (15, 1416375), (25, 849825), (27, 786875), (45, 472125), (75, 283275), (125, 169965), (135, 157375), (225, 94425), (375, 56655), (625, 33993), (675, 31475), (1125, 18885), (1259, 16875), (1875, 11331), (3375, 6295), (3777, 5625)]