19640000

素因数分解:

$2^6\times 5^4\times {\mathrm{491}}^1$

素因数の和:523

約数の個数: 70

約数和(自身を含む): 48800004

約数和(自身を除く): 29160004

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 491, 500, 625, 800, 982, 1000, 1250, 1600, 1964, 2000, 2455, 2500, 3928, 4000, 4910, 5000, 7856, 8000, 9820, 10000, 12275, 15712, 19640, 20000, 24550, 31424, 39280, 40000, 49100, 61375, 78560, 98200, 122750, 157120, 196400, 245500, 306875, 392800, 491000, 613750, 785600, 982000, 1227500, 1964000, 2455000, 3928000, 4910000, 9820000, 19640000]

約数ペア:

[(1, 19640000), (2, 9820000), (4, 4910000), (5, 3928000), (8, 2455000), (10, 1964000), (16, 1227500), (20, 982000), (25, 785600), (32, 613750), (40, 491000), (50, 392800), (64, 306875), (80, 245500), (100, 196400), (125, 157120), (160, 122750), (200, 98200), (250, 78560), (320, 61375), (400, 49100), (491, 40000), (500, 39280), (625, 31424), (800, 24550), (982, 20000), (1000, 19640), (1250, 15712), (1600, 12275), (1964, 10000), (2000, 9820), (2455, 8000), (2500, 7856), (3928, 5000), (4000, 4910)]