64991875

素因数分解:

$5^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{421}}^1$

素因数の和:473

約数の個数: 40

約数和(自身を含む): 92282960

約数和(自身を除く): 27291085

約数列:

[1, 5, 13, 19, 25, 65, 95, 125, 247, 325, 421, 475, 625, 1235, 1625, 2105, 2375, 5473, 6175, 7999, 8125, 10525, 11875, 27365, 30875, 39995, 52625, 103987, 136825, 154375, 199975, 263125, 519935, 684125, 999875, 2599675, 3420625, 4999375, 12998375, 64991875]

約数ペア:

[(1, 64991875), (5, 12998375), (13, 4999375), (19, 3420625), (25, 2599675), (65, 999875), (95, 684125), (125, 519935), (247, 263125), (325, 199975), (421, 154375), (475, 136825), (625, 103987), (1235, 52625), (1625, 39995), (2105, 30875), (2375, 27365), (5473, 11875), (6175, 10525), (7999, 8125)]