200390625

素因数分解:

$3^3\times 5^8\times {\mathrm{19}}^1$

素因数の和:68

約数の個数: 72

約数和(自身を含む): 390624800

約数和(自身を除く): 190234175

約数列:

[1, 3, 5, 9, 15, 19, 25, 27, 45, 57, 75, 95, 125, 135, 171, 225, 285, 375, 475, 513, 625, 675, 855, 1125, 1425, 1875, 2375, 2565, 3125, 3375, 4275, 5625, 7125, 9375, 11875, 12825, 15625, 16875, 21375, 28125, 35625, 46875, 59375, 64125, 78125, 84375, 106875, 140625, 178125, 234375, 296875, 320625, 390625, 421875, 534375, 703125, 890625, 1171875, 1484375, 1603125, 2109375, 2671875, 3515625, 4453125, 7421875, 8015625, 10546875, 13359375, 22265625, 40078125, 66796875, 200390625]

約数ペア:

[(1, 200390625), (3, 66796875), (5, 40078125), (9, 22265625), (15, 13359375), (19, 10546875), (25, 8015625), (27, 7421875), (45, 4453125), (57, 3515625), (75, 2671875), (95, 2109375), (125, 1603125), (135, 1484375), (171, 1171875), (225, 890625), (285, 703125), (375, 534375), (475, 421875), (513, 390625), (625, 320625), (675, 296875), (855, 234375), (1125, 178125), (1425, 140625), (1875, 106875), (2375, 84375), (2565, 78125), (3125, 64125), (3375, 59375), (4275, 46875), (5625, 35625), (7125, 28125), (9375, 21375), (11875, 16875), (12825, 15625)]