28158741

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{239}}^1$

素因数の和:330

約数の個数: 48

約数和(自身を含む): 47174400

約数和(自身を除く): 19015659

約数列:

[1, 3, 9, 13, 19, 39, 53, 57, 117, 159, 171, 239, 247, 477, 689, 717, 741, 1007, 2067, 2151, 2223, 3021, 3107, 4541, 6201, 9063, 9321, 12667, 13091, 13623, 27963, 38001, 39273, 40869, 59033, 114003, 117819, 164671, 177099, 240673, 494013, 531297, 722019, 1482039, 2166057, 3128749, 9386247, 28158741]

約数ペア:

[(1, 28158741), (3, 9386247), (9, 3128749), (13, 2166057), (19, 1482039), (39, 722019), (53, 531297), (57, 494013), (117, 240673), (159, 177099), (171, 164671), (239, 117819), (247, 114003), (477, 59033), (689, 40869), (717, 39273), (741, 38001), (1007, 27963), (2067, 13623), (2151, 13091), (2223, 12667), (3021, 9321), (3107, 9063), (4541, 6201)]