21505068

素因数分解:

$2^2\times 3^3\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{53}}^1$

素因数の和:113

約数の個数: 144

約数和(自身を含む): 64985760

約数和(自身を除く): 43480692

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 17, 18, 26, 27, 34, 36, 39, 51, 52, 53, 54, 68, 78, 102, 106, 108, 117, 153, 156, 159, 204, 212, 221, 234, 289, 306, 318, 351, 442, 459, 468, 477, 578, 612, 636, 663, 689, 702, 867, 884, 901, 918, 954, 1156, 1326, 1378, 1404, 1431, 1734, 1802, 1836, 1908, 1989, 2067, 2601, 2652, 2703, 2756, 2862, 3468, 3604, 3757, 3978, 4134, 5202, 5406, 5724, 5967, 6201, 7514, 7803, 7956, 8109, 8268, 10404, 10812, 11271, 11713, 11934, 12402, 15028, 15317, 15606, 16218, 18603, 22542, 23426, 23868, 24327, 24804, 30634, 31212, 32436, 33813, 35139, 37206, 45084, 45951, 46852, 48654, 61268, 67626, 70278, 74412, 91902, 97308, 101439, 105417, 135252, 137853, 140556, 183804, 199121, 202878, 210834, 275706, 316251, 398242, 405756, 413559, 421668, 551412, 597363, 632502, 796484, 827118, 1194726, 1265004, 1654236, 1792089, 2389452, 3584178, 5376267, 7168356, 10752534, 21505068]

約数ペア:

[(1, 21505068), (2, 10752534), (3, 7168356), (4, 5376267), (6, 3584178), (9, 2389452), (12, 1792089), (13, 1654236), (17, 1265004), (18, 1194726), (26, 827118), (27, 796484), (34, 632502), (36, 597363), (39, 551412), (51, 421668), (52, 413559), (53, 405756), (54, 398242), (68, 316251), (78, 275706), (102, 210834), (106, 202878), (108, 199121), (117, 183804), (153, 140556), (156, 137853), (159, 135252), (204, 105417), (212, 101439), (221, 97308), (234, 91902), (289, 74412), (306, 70278), (318, 67626), (351, 61268), (442, 48654), (459, 46852), (468, 45951), (477, 45084), (578, 37206), (612, 35139), (636, 33813), (663, 32436), (689, 31212), (702, 30634), (867, 24804), (884, 24327), (901, 23868), (918, 23426), (954, 22542), (1156, 18603), (1326, 16218), (1378, 15606), (1404, 15317), (1431, 15028), (1734, 12402), (1802, 11934), (1836, 11713), (1908, 11271), (1989, 10812), (2067, 10404), (2601, 8268), (2652, 8109), (2703, 7956), (2756, 7803), (2862, 7514), (3468, 6201), (3604, 5967), (3757, 5724), (3978, 5406), (4134, 5202)]