18137780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{809}}^1$

素因数の和:896

約数の個数: 48

約数和(自身を含む): 40824000

約数和(自身を除く): 22686220

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 59, 76, 95, 118, 190, 236, 295, 380, 590, 809, 1121, 1180, 1618, 2242, 3236, 4045, 4484, 5605, 8090, 11210, 15371, 16180, 22420, 30742, 47731, 61484, 76855, 95462, 153710, 190924, 238655, 307420, 477310, 906889, 954620, 1813778, 3627556, 4534445, 9068890, 18137780]

約数ペア:

[(1, 18137780), (2, 9068890), (4, 4534445), (5, 3627556), (10, 1813778), (19, 954620), (20, 906889), (38, 477310), (59, 307420), (76, 238655), (95, 190924), (118, 153710), (190, 95462), (236, 76855), (295, 61484), (380, 47731), (590, 30742), (809, 22420), (1121, 16180), (1180, 15371), (1618, 11210), (2242, 8090), (3236, 5605), (4045, 4484)]