209280981

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{109}}^1\times {\mathrm{541}}^1$

素因数の和:686

約数の個数: 48

約数和(自身を含む): 349134720

約数和(自身を除く): 139853739

約数列:

[1, 3, 7, 13, 21, 39, 91, 109, 169, 273, 327, 507, 541, 763, 1183, 1417, 1623, 2289, 3549, 3787, 4251, 7033, 9919, 11361, 18421, 21099, 29757, 49231, 55263, 58969, 91429, 128947, 147693, 176907, 274287, 386841, 412783, 640003, 766597, 1238349, 1920009, 2299791, 5366179, 9965761, 16098537, 29897283, 69760327, 209280981]

約数ペア:

[(1, 209280981), (3, 69760327), (7, 29897283), (13, 16098537), (21, 9965761), (39, 5366179), (91, 2299791), (109, 1920009), (169, 1238349), (273, 766597), (327, 640003), (507, 412783), (541, 386841), (763, 274287), (1183, 176907), (1417, 147693), (1623, 128947), (2289, 91429), (3549, 58969), (3787, 55263), (4251, 49231), (7033, 29757), (9919, 21099), (11361, 18421)]