2812500

素因数分解:

$2^2\times 3^2\times 5^7$

素因数の和:45

約数の個数: 72

約数和(自身を含む): 8886696

約数和(自身を除く): 6074196

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 30, 36, 45, 50, 60, 75, 90, 100, 125, 150, 180, 225, 250, 300, 375, 450, 500, 625, 750, 900, 1125, 1250, 1500, 1875, 2250, 2500, 3125, 3750, 4500, 5625, 6250, 7500, 9375, 11250, 12500, 15625, 18750, 22500, 28125, 31250, 37500, 46875, 56250, 62500, 78125, 93750, 112500, 140625, 156250, 187500, 234375, 281250, 312500, 468750, 562500, 703125, 937500, 1406250, 2812500]

約数ペア:

[(1, 2812500), (2, 1406250), (3, 937500), (4, 703125), (5, 562500), (6, 468750), (9, 312500), (10, 281250), (12, 234375), (15, 187500), (18, 156250), (20, 140625), (25, 112500), (30, 93750), (36, 78125), (45, 62500), (50, 56250), (60, 46875), (75, 37500), (90, 31250), (100, 28125), (125, 22500), (150, 18750), (180, 15625), (225, 12500), (250, 11250), (300, 9375), (375, 7500), (450, 6250), (500, 5625), (625, 4500), (750, 3750), (900, 3125), (1125, 2500), (1250, 2250), (1500, 1875)]