21104480

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7759}}^1$

素因数の和:7791

約数の個数: 48

約数和(自身を含む): 52799040

約数和(自身を除く): 31694560

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, 7759, 15518, 31036, 38795, 62072, 77590, 124144, 131903, 155180, 248288, 263806, 310360, 527612, 620720, 659515, 1055224, 1241440, 1319030, 2110448, 2638060, 4220896, 5276120, 10552240, 21104480]

約数ペア:

[(1, 21104480), (2, 10552240), (4, 5276120), (5, 4220896), (8, 2638060), (10, 2110448), (16, 1319030), (17, 1241440), (20, 1055224), (32, 659515), (34, 620720), (40, 527612), (68, 310360), (80, 263806), (85, 248288), (136, 155180), (160, 131903), (170, 124144), (272, 77590), (340, 62072), (544, 38795), (680, 31036), (1360, 15518), (2720, 7759)]