90910000

素因数分解:

$2^4\times 5^4\times {\mathrm{9091}}^1$

素因数の和:9119

約数の個数: 50

約数和(自身を含む): 220126412

約数和(自身を除く): 129216412

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 2000, 2500, 5000, 9091, 10000, 18182, 36364, 45455, 72728, 90910, 145456, 181820, 227275, 363640, 454550, 727280, 909100, 1136375, 1818200, 2272750, 3636400, 4545500, 5681875, 9091000, 11363750, 18182000, 22727500, 45455000, 90910000]

約数ペア:

[(1, 90910000), (2, 45455000), (4, 22727500), (5, 18182000), (8, 11363750), (10, 9091000), (16, 5681875), (20, 4545500), (25, 3636400), (40, 2272750), (50, 1818200), (80, 1136375), (100, 909100), (125, 727280), (200, 454550), (250, 363640), (400, 227275), (500, 181820), (625, 145456), (1000, 90910), (1250, 72728), (2000, 45455), (2500, 36364), (5000, 18182), (9091, 10000)]