19886000

素因数分解:

$2^4\times 5^3\times {\mathrm{61}}^1\times {\mathrm{163}}^1$

素因数の和:247

約数の個数: 80

約数和(自身を含む): 49172448

約数和(自身を除く): 29286448

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 61, 80, 100, 122, 125, 163, 200, 244, 250, 305, 326, 400, 488, 500, 610, 652, 815, 976, 1000, 1220, 1304, 1525, 1630, 2000, 2440, 2608, 3050, 3260, 4075, 4880, 6100, 6520, 7625, 8150, 9943, 12200, 13040, 15250, 16300, 19886, 20375, 24400, 30500, 32600, 39772, 40750, 49715, 61000, 65200, 79544, 81500, 99430, 122000, 159088, 163000, 198860, 248575, 326000, 397720, 497150, 795440, 994300, 1242875, 1988600, 2485750, 3977200, 4971500, 9943000, 19886000]

約数ペア:

[(1, 19886000), (2, 9943000), (4, 4971500), (5, 3977200), (8, 2485750), (10, 1988600), (16, 1242875), (20, 994300), (25, 795440), (40, 497150), (50, 397720), (61, 326000), (80, 248575), (100, 198860), (122, 163000), (125, 159088), (163, 122000), (200, 99430), (244, 81500), (250, 79544), (305, 65200), (326, 61000), (400, 49715), (488, 40750), (500, 39772), (610, 32600), (652, 30500), (815, 24400), (976, 20375), (1000, 19886), (1220, 16300), (1304, 15250), (1525, 13040), (1630, 12200), (2000, 9943), (2440, 8150), (2608, 7625), (3050, 6520), (3260, 6100), (4075, 4880)]