21017916

素因数分解:

$2^2\times 3^2\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{563}}^1$

素因数の和:651

約数の個数: 72

約数和(自身を含む): 57277584

約数和(自身を除く): 36259668

約数列:

[1, 2, 3, 4, 6, 9, 12, 17, 18, 34, 36, 51, 61, 68, 102, 122, 153, 183, 204, 244, 306, 366, 549, 563, 612, 732, 1037, 1098, 1126, 1689, 2074, 2196, 2252, 3111, 3378, 4148, 5067, 6222, 6756, 9333, 9571, 10134, 12444, 18666, 19142, 20268, 28713, 34343, 37332, 38284, 57426, 68686, 86139, 103029, 114852, 137372, 172278, 206058, 309087, 344556, 412116, 583831, 618174, 1167662, 1236348, 1751493, 2335324, 3502986, 5254479, 7005972, 10508958, 21017916]

約数ペア:

[(1, 21017916), (2, 10508958), (3, 7005972), (4, 5254479), (6, 3502986), (9, 2335324), (12, 1751493), (17, 1236348), (18, 1167662), (34, 618174), (36, 583831), (51, 412116), (61, 344556), (68, 309087), (102, 206058), (122, 172278), (153, 137372), (183, 114852), (204, 103029), (244, 86139), (306, 68686), (366, 57426), (549, 38284), (563, 37332), (612, 34343), (732, 28713), (1037, 20268), (1098, 19142), (1126, 18666), (1689, 12444), (2074, 10134), (2196, 9571), (2252, 9333), (3111, 6756), (3378, 6222), (4148, 5067)]