18815980

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{541}}^1$

素因数の和:634

約数の個数: 48

約数和(自身を含む): 41521536

約数和(自身を除く): 22705556

約数列:

[1, 2, 4, 5, 10, 20, 37, 47, 74, 94, 148, 185, 188, 235, 370, 470, 541, 740, 940, 1082, 1739, 2164, 2705, 3478, 5410, 6956, 8695, 10820, 17390, 20017, 25427, 34780, 40034, 50854, 80068, 100085, 101708, 127135, 200170, 254270, 400340, 508540, 940799, 1881598, 3763196, 4703995, 9407990, 18815980]

約数ペア:

[(1, 18815980), (2, 9407990), (4, 4703995), (5, 3763196), (10, 1881598), (20, 940799), (37, 508540), (47, 400340), (74, 254270), (94, 200170), (148, 127135), (185, 101708), (188, 100085), (235, 80068), (370, 50854), (470, 40034), (541, 34780), (740, 25427), (940, 20017), (1082, 17390), (1739, 10820), (2164, 8695), (2705, 6956), (3478, 5410)]