20398742

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{347}}^1$

素因数の和:405

約数の個数: 64

約数和(自身を含む): 42094080

約数和(自身を除く): 21695338

約数列:

[1, 2, 7, 13, 14, 17, 19, 26, 34, 38, 91, 119, 133, 182, 221, 238, 247, 266, 323, 347, 442, 494, 646, 694, 1547, 1729, 2261, 2429, 3094, 3458, 4199, 4511, 4522, 4858, 5899, 6593, 8398, 9022, 11798, 13186, 29393, 31577, 41293, 46151, 58786, 63154, 76687, 82586, 85709, 92302, 112081, 153374, 171418, 224162, 536809, 599963, 784567, 1073618, 1199926, 1457053, 1569134, 2914106, 10199371, 20398742]

約数ペア:

[(1, 20398742), (2, 10199371), (7, 2914106), (13, 1569134), (14, 1457053), (17, 1199926), (19, 1073618), (26, 784567), (34, 599963), (38, 536809), (91, 224162), (119, 171418), (133, 153374), (182, 112081), (221, 92302), (238, 85709), (247, 82586), (266, 76687), (323, 63154), (347, 58786), (442, 46151), (494, 41293), (646, 31577), (694, 29393), (1547, 13186), (1729, 11798), (2261, 9022), (2429, 8398), (3094, 6593), (3458, 5899), (4199, 4858), (4511, 4522)]