81880000

素因数分解:

$2^6\times 5^4\times {\mathrm{23}}^1\times {\mathrm{89}}^1$

素因数の和:144

約数の個数: 140

約数和(自身を含む): 214243920

約数和(自身を除く): 132363920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 25, 32, 40, 46, 50, 64, 80, 89, 92, 100, 115, 125, 160, 178, 184, 200, 230, 250, 320, 356, 368, 400, 445, 460, 500, 575, 625, 712, 736, 800, 890, 920, 1000, 1150, 1250, 1424, 1472, 1600, 1780, 1840, 2000, 2047, 2225, 2300, 2500, 2848, 2875, 3560, 3680, 4000, 4094, 4450, 4600, 5000, 5696, 5750, 7120, 7360, 8000, 8188, 8900, 9200, 10000, 10235, 11125, 11500, 14240, 14375, 16376, 17800, 18400, 20000, 20470, 22250, 23000, 28480, 28750, 32752, 35600, 36800, 40000, 40940, 44500, 46000, 51175, 55625, 57500, 65504, 71200, 81880, 89000, 92000, 102350, 111250, 115000, 131008, 142400, 163760, 178000, 184000, 204700, 222500, 230000, 255875, 327520, 356000, 409400, 445000, 460000, 511750, 655040, 712000, 818800, 890000, 920000, 1023500, 1279375, 1637600, 1780000, 2047000, 2558750, 3275200, 3560000, 4094000, 5117500, 8188000, 10235000, 16376000, 20470000, 40940000, 81880000]

約数ペア:

[(1, 81880000), (2, 40940000), (4, 20470000), (5, 16376000), (8, 10235000), (10, 8188000), (16, 5117500), (20, 4094000), (23, 3560000), (25, 3275200), (32, 2558750), (40, 2047000), (46, 1780000), (50, 1637600), (64, 1279375), (80, 1023500), (89, 920000), (92, 890000), (100, 818800), (115, 712000), (125, 655040), (160, 511750), (178, 460000), (184, 445000), (200, 409400), (230, 356000), (250, 327520), (320, 255875), (356, 230000), (368, 222500), (400, 204700), (445, 184000), (460, 178000), (500, 163760), (575, 142400), (625, 131008), (712, 115000), (736, 111250), (800, 102350), (890, 92000), (920, 89000), (1000, 81880), (1150, 71200), (1250, 65504), (1424, 57500), (1472, 55625), (1600, 51175), (1780, 46000), (1840, 44500), (2000, 40940), (2047, 40000), (2225, 36800), (2300, 35600), (2500, 32752), (2848, 28750), (2875, 28480), (3560, 23000), (3680, 22250), (4000, 20470), (4094, 20000), (4450, 18400), (4600, 17800), (5000, 16376), (5696, 14375), (5750, 14240), (7120, 11500), (7360, 11125), (8000, 10235), (8188, 10000), (8900, 9200)]