18984375

素因数分解:

$3^5\times 5^7$

素因数の和:50

約数の個数: 48

約数和(自身を含む): 35546784

約数和(自身を除く): 16562409

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 125, 135, 225, 243, 375, 405, 625, 675, 1125, 1215, 1875, 2025, 3125, 3375, 5625, 6075, 9375, 10125, 15625, 16875, 28125, 30375, 46875, 50625, 78125, 84375, 140625, 151875, 234375, 253125, 421875, 703125, 759375, 1265625, 2109375, 3796875, 6328125, 18984375]

約数ペア:

[(1, 18984375), (3, 6328125), (5, 3796875), (9, 2109375), (15, 1265625), (25, 759375), (27, 703125), (45, 421875), (75, 253125), (81, 234375), (125, 151875), (135, 140625), (225, 84375), (243, 78125), (375, 50625), (405, 46875), (625, 30375), (675, 28125), (1125, 16875), (1215, 15625), (1875, 10125), (2025, 9375), (3125, 6075), (3375, 5625)]