18765740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{311}}^1\times {\mathrm{431}}^1$

素因数の和:758

約数の個数: 48

約数和(自身を含む): 45287424

約数和(自身を除く): 26521684

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 311, 431, 622, 862, 1244, 1555, 1724, 2155, 2177, 3017, 3110, 4310, 4354, 6034, 6220, 8620, 8708, 10885, 12068, 15085, 21770, 30170, 43540, 60340, 134041, 268082, 536164, 670205, 938287, 1340410, 1876574, 2680820, 3753148, 4691435, 9382870, 18765740]

約数ペア:

[(1, 18765740), (2, 9382870), (4, 4691435), (5, 3753148), (7, 2680820), (10, 1876574), (14, 1340410), (20, 938287), (28, 670205), (35, 536164), (70, 268082), (140, 134041), (311, 60340), (431, 43540), (622, 30170), (862, 21770), (1244, 15085), (1555, 12068), (1724, 10885), (2155, 8708), (2177, 8620), (3017, 6220), (3110, 6034), (4310, 4354)]