20125000

素因数分解:

$2^3\times 5^6\times 7^1\times {\mathrm{23}}^1$

素因数の和:66

約数の個数: 112

約数和(自身を含む): 56249280

約数和(自身を除く): 36124280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 25, 28, 35, 40, 46, 50, 56, 70, 92, 100, 115, 125, 140, 161, 175, 184, 200, 230, 250, 280, 322, 350, 460, 500, 575, 625, 644, 700, 805, 875, 920, 1000, 1150, 1250, 1288, 1400, 1610, 1750, 2300, 2500, 2875, 3125, 3220, 3500, 4025, 4375, 4600, 5000, 5750, 6250, 6440, 7000, 8050, 8750, 11500, 12500, 14375, 15625, 16100, 17500, 20125, 21875, 23000, 25000, 28750, 31250, 32200, 35000, 40250, 43750, 57500, 62500, 71875, 80500, 87500, 100625, 109375, 115000, 125000, 143750, 161000, 175000, 201250, 218750, 287500, 359375, 402500, 437500, 503125, 575000, 718750, 805000, 875000, 1006250, 1437500, 2012500, 2515625, 2875000, 4025000, 5031250, 10062500, 20125000]

約数ペア:

[(1, 20125000), (2, 10062500), (4, 5031250), (5, 4025000), (7, 2875000), (8, 2515625), (10, 2012500), (14, 1437500), (20, 1006250), (23, 875000), (25, 805000), (28, 718750), (35, 575000), (40, 503125), (46, 437500), (50, 402500), (56, 359375), (70, 287500), (92, 218750), (100, 201250), (115, 175000), (125, 161000), (140, 143750), (161, 125000), (175, 115000), (184, 109375), (200, 100625), (230, 87500), (250, 80500), (280, 71875), (322, 62500), (350, 57500), (460, 43750), (500, 40250), (575, 35000), (625, 32200), (644, 31250), (700, 28750), (805, 25000), (875, 23000), (920, 21875), (1000, 20125), (1150, 17500), (1250, 16100), (1288, 15625), (1400, 14375), (1610, 12500), (1750, 11500), (2300, 8750), (2500, 8050), (2875, 7000), (3125, 6440), (3220, 6250), (3500, 5750), (4025, 5000), (4375, 4600)]