18553720

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:268

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 24991880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 71, 94, 139, 142, 188, 235, 278, 284, 355, 376, 470, 556, 568, 695, 710, 940, 1112, 1390, 1420, 1880, 2780, 2840, 3337, 5560, 6533, 6674, 9869, 13066, 13348, 16685, 19738, 26132, 26696, 32665, 33370, 39476, 49345, 52264, 65330, 66740, 78952, 98690, 130660, 133480, 197380, 261320, 394760, 463843, 927686, 1855372, 2319215, 3710744, 4638430, 9276860, 18553720]

約数ペア:

[(1, 18553720), (2, 9276860), (4, 4638430), (5, 3710744), (8, 2319215), (10, 1855372), (20, 927686), (40, 463843), (47, 394760), (71, 261320), (94, 197380), (139, 133480), (142, 130660), (188, 98690), (235, 78952), (278, 66740), (284, 65330), (355, 52264), (376, 49345), (470, 39476), (556, 33370), (568, 32665), (695, 26696), (710, 26132), (940, 19738), (1112, 16685), (1390, 13348), (1420, 13066), (1880, 9869), (2780, 6674), (2840, 6533), (3337, 5560)]