21784480

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{8009}}^1$

素因数の和:8041

約数の個数: 48

約数和(自身を含む): 54500040

約数和(自身を除く): 32715560

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 8009, 16018, 32036, 40045, 64072, 80090, 128144, 136153, 160180, 256288, 272306, 320360, 544612, 640720, 680765, 1089224, 1281440, 1361530, 2178448, 2723060, 4356896, 5446120, 10892240, 21784480]

約数ペア:

[(1, 21784480), (2, 10892240), (4, 5446120), (5, 4356896), (8, 2723060), (10, 2178448), (16, 1361530), (17, 1281440), (20, 1089224), (32, 680765), (34, 640720), (40, 544612), (68, 320360), (80, 272306), (85, 256288), (136, 160180), (160, 136153), (170, 128144), (272, 80090), (340, 64072), (544, 40045), (680, 32036), (1360, 16018), (2720, 8009)]