21820000

素因数分解:

$2^5\times 5^4\times {\mathrm{1091}}^1$

素因数の和:1121

約数の個数: 60

約数和(自身を含む): 53729676

約数和(自身を除く): 31909676

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, 1091, 1250, 2000, 2182, 2500, 4000, 4364, 5000, 5455, 8728, 10000, 10910, 17456, 20000, 21820, 27275, 34912, 43640, 54550, 87280, 109100, 136375, 174560, 218200, 272750, 436400, 545500, 681875, 872800, 1091000, 1363750, 2182000, 2727500, 4364000, 5455000, 10910000, 21820000]

約数ペア:

[(1, 21820000), (2, 10910000), (4, 5455000), (5, 4364000), (8, 2727500), (10, 2182000), (16, 1363750), (20, 1091000), (25, 872800), (32, 681875), (40, 545500), (50, 436400), (80, 272750), (100, 218200), (125, 174560), (160, 136375), (200, 109100), (250, 87280), (400, 54550), (500, 43640), (625, 34912), (800, 27275), (1000, 21820), (1091, 20000), (1250, 17456), (2000, 10910), (2182, 10000), (2500, 8728), (4000, 5455), (4364, 5000)]