21201516

素因数分解:

$2^2\times 3^2\times 7^3\times {\mathrm{17}}^1\times {\mathrm{101}}^1$

素因数の和:149

約数の個数: 144

約数和(自身を含む): 66830400

約数和(自身を除く): 45628884

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 17, 18, 21, 28, 34, 36, 42, 49, 51, 63, 68, 84, 98, 101, 102, 119, 126, 147, 153, 196, 202, 204, 238, 252, 294, 303, 306, 343, 357, 404, 441, 476, 588, 606, 612, 686, 707, 714, 833, 882, 909, 1029, 1071, 1212, 1372, 1414, 1428, 1666, 1717, 1764, 1818, 2058, 2121, 2142, 2499, 2828, 3087, 3332, 3434, 3636, 4116, 4242, 4284, 4949, 4998, 5151, 5831, 6174, 6363, 6868, 7497, 8484, 9898, 9996, 10302, 11662, 12019, 12348, 12726, 14847, 14994, 15453, 17493, 19796, 20604, 23324, 24038, 25452, 29694, 29988, 30906, 34643, 34986, 36057, 44541, 48076, 52479, 59388, 61812, 69286, 69972, 72114, 84133, 89082, 103929, 104958, 108171, 138572, 144228, 168266, 178164, 207858, 209916, 216342, 252399, 311787, 336532, 415716, 432684, 504798, 588931, 623574, 757197, 1009596, 1177862, 1247148, 1514394, 1766793, 2355724, 3028788, 3533586, 5300379, 7067172, 10600758, 21201516]

約数ペア:

[(1, 21201516), (2, 10600758), (3, 7067172), (4, 5300379), (6, 3533586), (7, 3028788), (9, 2355724), (12, 1766793), (14, 1514394), (17, 1247148), (18, 1177862), (21, 1009596), (28, 757197), (34, 623574), (36, 588931), (42, 504798), (49, 432684), (51, 415716), (63, 336532), (68, 311787), (84, 252399), (98, 216342), (101, 209916), (102, 207858), (119, 178164), (126, 168266), (147, 144228), (153, 138572), (196, 108171), (202, 104958), (204, 103929), (238, 89082), (252, 84133), (294, 72114), (303, 69972), (306, 69286), (343, 61812), (357, 59388), (404, 52479), (441, 48076), (476, 44541), (588, 36057), (606, 34986), (612, 34643), (686, 30906), (707, 29988), (714, 29694), (833, 25452), (882, 24038), (909, 23324), (1029, 20604), (1071, 19796), (1212, 17493), (1372, 15453), (1414, 14994), (1428, 14847), (1666, 12726), (1717, 12348), (1764, 12019), (1818, 11662), (2058, 10302), (2121, 9996), (2142, 9898), (2499, 8484), (2828, 7497), (3087, 6868), (3332, 6363), (3434, 6174), (3636, 5831), (4116, 5151), (4242, 4998), (4284, 4949)]