18692840

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{163}}^1$

素因数の和:282

約数の個数: 64

約数和(自身を含む): 43925760

約数和(自身を除く): 25232920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 61, 94, 122, 163, 188, 235, 244, 305, 326, 376, 470, 488, 610, 652, 815, 940, 1220, 1304, 1630, 1880, 2440, 2867, 3260, 5734, 6520, 7661, 9943, 11468, 14335, 15322, 19886, 22936, 28670, 30644, 38305, 39772, 49715, 57340, 61288, 76610, 79544, 99430, 114680, 153220, 198860, 306440, 397720, 467321, 934642, 1869284, 2336605, 3738568, 4673210, 9346420, 18692840]

約数ペア:

[(1, 18692840), (2, 9346420), (4, 4673210), (5, 3738568), (8, 2336605), (10, 1869284), (20, 934642), (40, 467321), (47, 397720), (61, 306440), (94, 198860), (122, 153220), (163, 114680), (188, 99430), (235, 79544), (244, 76610), (305, 61288), (326, 57340), (376, 49715), (470, 39772), (488, 38305), (610, 30644), (652, 28670), (815, 22936), (940, 19886), (1220, 15322), (1304, 14335), (1630, 11468), (1880, 9943), (2440, 7661), (2867, 6520), (3260, 5734)]