17978896

素因数分解:

$2^4\times {\mathrm{13}}^2\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:204

約数の個数: 60

約数和(自身を含む): 38689860

約数和(自身を除く): 20710964

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 61, 104, 109, 122, 169, 208, 218, 244, 338, 436, 488, 676, 793, 872, 976, 1352, 1417, 1586, 1744, 2704, 2834, 3172, 5668, 6344, 6649, 10309, 11336, 12688, 13298, 18421, 20618, 22672, 26596, 36842, 41236, 53192, 73684, 82472, 86437, 106384, 147368, 164944, 172874, 294736, 345748, 691496, 1123681, 1382992, 2247362, 4494724, 8989448, 17978896]

約数ペア:

[(1, 17978896), (2, 8989448), (4, 4494724), (8, 2247362), (13, 1382992), (16, 1123681), (26, 691496), (52, 345748), (61, 294736), (104, 172874), (109, 164944), (122, 147368), (169, 106384), (208, 86437), (218, 82472), (244, 73684), (338, 53192), (436, 41236), (488, 36842), (676, 26596), (793, 22672), (872, 20618), (976, 18421), (1352, 13298), (1417, 12688), (1586, 11336), (1744, 10309), (2704, 6649), (2834, 6344), (3172, 5668)]