19996875

素因数分解:

$3^4\times 5^5\times {\mathrm{79}}^1$

素因数の和:116

約数の個数: 60

約数和(自身を含む): 37810080

約数和(自身を除く): 17813205

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 79, 81, 125, 135, 225, 237, 375, 395, 405, 625, 675, 711, 1125, 1185, 1875, 1975, 2025, 2133, 3125, 3375, 3555, 5625, 5925, 6399, 9375, 9875, 10125, 10665, 16875, 17775, 28125, 29625, 31995, 49375, 50625, 53325, 84375, 88875, 148125, 159975, 246875, 253125, 266625, 444375, 740625, 799875, 1333125, 2221875, 3999375, 6665625, 19996875]

約数ペア:

[(1, 19996875), (3, 6665625), (5, 3999375), (9, 2221875), (15, 1333125), (25, 799875), (27, 740625), (45, 444375), (75, 266625), (79, 253125), (81, 246875), (125, 159975), (135, 148125), (225, 88875), (237, 84375), (375, 53325), (395, 50625), (405, 49375), (625, 31995), (675, 29625), (711, 28125), (1125, 17775), (1185, 16875), (1875, 10665), (1975, 10125), (2025, 9875), (2133, 9375), (3125, 6399), (3375, 5925), (3555, 5625)]