21965463

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{241}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 36996960

約数和(自身を除く): 15031497

約数列:

[1, 3, 9, 13, 19, 39, 41, 57, 117, 123, 171, 241, 247, 369, 533, 723, 741, 779, 1599, 2169, 2223, 2337, 3133, 4579, 4797, 7011, 9399, 9881, 10127, 13737, 28197, 29643, 30381, 41211, 59527, 88929, 91143, 128453, 178581, 187739, 385359, 535743, 563217, 1156077, 1689651, 2440607, 7321821, 21965463]

約数ペア:

[(1, 21965463), (3, 7321821), (9, 2440607), (13, 1689651), (19, 1156077), (39, 563217), (41, 535743), (57, 385359), (117, 187739), (123, 178581), (171, 128453), (241, 91143), (247, 88929), (369, 59527), (533, 41211), (723, 30381), (741, 29643), (779, 28197), (1599, 13737), (2169, 10127), (2223, 9881), (2337, 9399), (3133, 7011), (4579, 4797)]