21257208

素因数分解:

$2^3\times 3^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{827}}^1$

素因数の和:866

約数の個数: 128

約数和(自身を含む): 71539200

約数和(自身を除く): 50281992

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 17, 18, 21, 24, 27, 28, 34, 36, 42, 51, 54, 56, 63, 68, 72, 84, 102, 108, 119, 126, 136, 153, 168, 189, 204, 216, 238, 252, 306, 357, 378, 408, 459, 476, 504, 612, 714, 756, 827, 918, 952, 1071, 1224, 1428, 1512, 1654, 1836, 2142, 2481, 2856, 3213, 3308, 3672, 4284, 4962, 5789, 6426, 6616, 7443, 8568, 9924, 11578, 12852, 14059, 14886, 17367, 19848, 22329, 23156, 25704, 28118, 29772, 34734, 42177, 44658, 46312, 52101, 56236, 59544, 69468, 84354, 89316, 98413, 104202, 112472, 126531, 138936, 156303, 168708, 178632, 196826, 208404, 253062, 295239, 312606, 337416, 379593, 393652, 416808, 506124, 590478, 625212, 759186, 787304, 885717, 1012248, 1180956, 1250424, 1518372, 1771434, 2361912, 2657151, 3036744, 3542868, 5314302, 7085736, 10628604, 21257208]

約数ペア:

[(1, 21257208), (2, 10628604), (3, 7085736), (4, 5314302), (6, 3542868), (7, 3036744), (8, 2657151), (9, 2361912), (12, 1771434), (14, 1518372), (17, 1250424), (18, 1180956), (21, 1012248), (24, 885717), (27, 787304), (28, 759186), (34, 625212), (36, 590478), (42, 506124), (51, 416808), (54, 393652), (56, 379593), (63, 337416), (68, 312606), (72, 295239), (84, 253062), (102, 208404), (108, 196826), (119, 178632), (126, 168708), (136, 156303), (153, 138936), (168, 126531), (189, 112472), (204, 104202), (216, 98413), (238, 89316), (252, 84354), (306, 69468), (357, 59544), (378, 56236), (408, 52101), (459, 46312), (476, 44658), (504, 42177), (612, 34734), (714, 29772), (756, 28118), (827, 25704), (918, 23156), (952, 22329), (1071, 19848), (1224, 17367), (1428, 14886), (1512, 14059), (1654, 12852), (1836, 11578), (2142, 9924), (2481, 8568), (2856, 7443), (3213, 6616), (3308, 6426), (3672, 5789), (4284, 4962)]