21502756

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{89}}^1$

素因数の和:157

約数の個数: 72

約数和(自身を含む): 46418400

約数和(自身を除く): 24915644

約数列:

[1, 2, 4, 11, 17, 19, 22, 34, 38, 44, 68, 76, 89, 178, 187, 209, 289, 323, 356, 374, 418, 578, 646, 748, 836, 979, 1156, 1292, 1513, 1691, 1958, 3026, 3179, 3382, 3553, 3916, 5491, 6052, 6358, 6764, 7106, 10982, 12716, 14212, 16643, 18601, 21964, 25721, 28747, 33286, 37202, 51442, 57494, 60401, 66572, 74404, 102884, 114988, 120802, 241604, 282931, 316217, 488699, 565862, 632434, 977398, 1131724, 1264868, 1954796, 5375689, 10751378, 21502756]

約数ペア:

[(1, 21502756), (2, 10751378), (4, 5375689), (11, 1954796), (17, 1264868), (19, 1131724), (22, 977398), (34, 632434), (38, 565862), (44, 488699), (68, 316217), (76, 282931), (89, 241604), (178, 120802), (187, 114988), (209, 102884), (289, 74404), (323, 66572), (356, 60401), (374, 57494), (418, 51442), (578, 37202), (646, 33286), (748, 28747), (836, 25721), (979, 21964), (1156, 18601), (1292, 16643), (1513, 14212), (1691, 12716), (1958, 10982), (3026, 7106), (3179, 6764), (3382, 6358), (3553, 6052), (3916, 5491)]