12901988

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1$

素因数の和:129

約数の個数: 72

約数和(自身を含む): 27706560

約数和(自身を除く): 14804572

約数列:

[1, 2, 4, 11, 19, 22, 23, 38, 44, 46, 61, 76, 92, 121, 122, 209, 242, 244, 253, 418, 437, 484, 506, 671, 836, 874, 1012, 1159, 1342, 1403, 1748, 2299, 2318, 2684, 2783, 2806, 4598, 4636, 4807, 5566, 5612, 7381, 9196, 9614, 11132, 12749, 14762, 15433, 19228, 25498, 26657, 29524, 30866, 50996, 52877, 53314, 61732, 105754, 106628, 140239, 169763, 211508, 280478, 293227, 339526, 560956, 586454, 679052, 1172908, 3225497, 6450994, 12901988]

約数ペア:

[(1, 12901988), (2, 6450994), (4, 3225497), (11, 1172908), (19, 679052), (22, 586454), (23, 560956), (38, 339526), (44, 293227), (46, 280478), (61, 211508), (76, 169763), (92, 140239), (121, 106628), (122, 105754), (209, 61732), (242, 53314), (244, 52877), (253, 50996), (418, 30866), (437, 29524), (484, 26657), (506, 25498), (671, 19228), (836, 15433), (874, 14762), (1012, 12749), (1159, 11132), (1342, 9614), (1403, 9196), (1748, 7381), (2299, 5612), (2318, 5566), (2684, 4807), (2783, 4636), (2806, 4598)]