81820000

素因数分解:

$2^5\times 5^4\times {\mathrm{4091}}^1$

素因数の和:4121

約数の個数: 60

約数和(自身を含む): 201338676

約数和(自身を除く): 119518676

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 625, 800, 1000, 1250, 2000, 2500, 4000, 4091, 5000, 8182, 10000, 16364, 20000, 20455, 32728, 40910, 65456, 81820, 102275, 130912, 163640, 204550, 327280, 409100, 511375, 654560, 818200, 1022750, 1636400, 2045500, 2556875, 3272800, 4091000, 5113750, 8182000, 10227500, 16364000, 20455000, 40910000, 81820000]

約数ペア:

[(1, 81820000), (2, 40910000), (4, 20455000), (5, 16364000), (8, 10227500), (10, 8182000), (16, 5113750), (20, 4091000), (25, 3272800), (32, 2556875), (40, 2045500), (50, 1636400), (80, 1022750), (100, 818200), (125, 654560), (160, 511375), (200, 409100), (250, 327280), (400, 204550), (500, 163640), (625, 130912), (800, 102275), (1000, 81820), (1250, 65456), (2000, 40910), (2500, 32728), (4000, 20455), (4091, 20000), (5000, 16364), (8182, 10000)]