20470000

素因数分解:

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

素因数の和:140

約数の個数: 100

約数和(自身を含む): 52295760

約数和(自身を除く): 31825760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 25, 40, 46, 50, 80, 89, 92, 100, 115, 125, 178, 184, 200, 230, 250, 356, 368, 400, 445, 460, 500, 575, 625, 712, 890, 920, 1000, 1150, 1250, 1424, 1780, 1840, 2000, 2047, 2225, 2300, 2500, 2875, 3560, 4094, 4450, 4600, 5000, 5750, 7120, 8188, 8900, 9200, 10000, 10235, 11125, 11500, 14375, 16376, 17800, 20470, 22250, 23000, 28750, 32752, 35600, 40940, 44500, 46000, 51175, 55625, 57500, 81880, 89000, 102350, 111250, 115000, 163760, 178000, 204700, 222500, 230000, 255875, 409400, 445000, 511750, 818800, 890000, 1023500, 1279375, 2047000, 2558750, 4094000, 5117500, 10235000, 20470000]

約数ペア:

[(1, 20470000), (2, 10235000), (4, 5117500), (5, 4094000), (8, 2558750), (10, 2047000), (16, 1279375), (20, 1023500), (23, 890000), (25, 818800), (40, 511750), (46, 445000), (50, 409400), (80, 255875), (89, 230000), (92, 222500), (100, 204700), (115, 178000), (125, 163760), (178, 115000), (184, 111250), (200, 102350), (230, 89000), (250, 81880), (356, 57500), (368, 55625), (400, 51175), (445, 46000), (460, 44500), (500, 40940), (575, 35600), (625, 32752), (712, 28750), (890, 23000), (920, 22250), (1000, 20470), (1150, 17800), (1250, 16376), (1424, 14375), (1780, 11500), (1840, 11125), (2000, 10235), (2047, 10000), (2225, 9200), (2300, 8900), (2500, 8188), (2875, 7120), (3560, 5750), (4094, 5000), (4450, 4600)]