18770840

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1153}}^1$

素因数の和:1212

約数の個数: 64

約数和(自身を含む): 47360160

約数和(自身を除く): 28589320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 37, 40, 44, 55, 74, 88, 110, 148, 185, 220, 296, 370, 407, 440, 740, 814, 1153, 1480, 1628, 2035, 2306, 3256, 4070, 4612, 5765, 8140, 9224, 11530, 12683, 16280, 23060, 25366, 42661, 46120, 50732, 63415, 85322, 101464, 126830, 170644, 213305, 253660, 341288, 426610, 469271, 507320, 853220, 938542, 1706440, 1877084, 2346355, 3754168, 4692710, 9385420, 18770840]

約数ペア:

[(1, 18770840), (2, 9385420), (4, 4692710), (5, 3754168), (8, 2346355), (10, 1877084), (11, 1706440), (20, 938542), (22, 853220), (37, 507320), (40, 469271), (44, 426610), (55, 341288), (74, 253660), (88, 213305), (110, 170644), (148, 126830), (185, 101464), (220, 85322), (296, 63415), (370, 50732), (407, 46120), (440, 42661), (740, 25366), (814, 23060), (1153, 16280), (1480, 12683), (1628, 11530), (2035, 9224), (2306, 8140), (3256, 5765), (4070, 4612)]