20679505

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{257}}^1$

素因数の和:310

約数の個数: 48

約数和(自身を含む): 32941440

約数和(自身を除く): 12261935

約数列:

[1, 5, 7, 11, 19, 35, 55, 77, 95, 121, 133, 209, 257, 385, 605, 665, 847, 1045, 1285, 1463, 1799, 2299, 2827, 4235, 4883, 7315, 8995, 11495, 14135, 16093, 19789, 24415, 31097, 34181, 53713, 80465, 98945, 155485, 170905, 217679, 268565, 375991, 590843, 1088395, 1879955, 2954215, 4135901, 20679505]

約数ペア:

[(1, 20679505), (5, 4135901), (7, 2954215), (11, 1879955), (19, 1088395), (35, 590843), (55, 375991), (77, 268565), (95, 217679), (121, 170905), (133, 155485), (209, 98945), (257, 80465), (385, 53713), (605, 34181), (665, 31097), (847, 24415), (1045, 19789), (1285, 16093), (1463, 14135), (1799, 11495), (2299, 8995), (2827, 7315), (4235, 4883)]