20416851

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{257}}^1$

素因数の和:380

約数の個数: 48

約数和(自身を含む): 36813504

約数和(自身を除く): 16396653

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 97, 117, 257, 273, 291, 679, 771, 819, 873, 1261, 1799, 2037, 2313, 3341, 3783, 5397, 6111, 8827, 10023, 11349, 16191, 23387, 24929, 26481, 30069, 70161, 74787, 79443, 174503, 210483, 224361, 324077, 523509, 972231, 1570527, 2268539, 2916693, 6805617, 20416851]

約数ペア:

[(1, 20416851), (3, 6805617), (7, 2916693), (9, 2268539), (13, 1570527), (21, 972231), (39, 523509), (63, 324077), (91, 224361), (97, 210483), (117, 174503), (257, 79443), (273, 74787), (291, 70161), (679, 30069), (771, 26481), (819, 24929), (873, 23387), (1261, 16191), (1799, 11349), (2037, 10023), (2313, 8827), (3341, 6111), (3783, 5397)]