18940000

素因数分解:

$2^5\times 5^4\times {\mathrm{947}}^1$

素因数の和:977

約数の個数: 60

約数和(自身を含む): 46644444

約数和(自身を除く): 27704444

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, 947, 1000, 1250, 1894, 2000, 2500, 3788, 4000, 4735, 5000, 7576, 9470, 10000, 15152, 18940, 20000, 23675, 30304, 37880, 47350, 75760, 94700, 118375, 151520, 189400, 236750, 378800, 473500, 591875, 757600, 947000, 1183750, 1894000, 2367500, 3788000, 4735000, 9470000, 18940000]

約数ペア:

[(1, 18940000), (2, 9470000), (4, 4735000), (5, 3788000), (8, 2367500), (10, 1894000), (16, 1183750), (20, 947000), (25, 757600), (32, 591875), (40, 473500), (50, 378800), (80, 236750), (100, 189400), (125, 151520), (160, 118375), (200, 94700), (250, 75760), (400, 47350), (500, 37880), (625, 30304), (800, 23675), (947, 20000), (1000, 18940), (1250, 15152), (1894, 10000), (2000, 9470), (2500, 7576), (3788, 5000), (4000, 4735)]