20217920

素因数分解:

$2^6\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1$

素因数の和:148

約数の個数: 112

約数和(自身を含む): 52230528

約数和(自身を除く): 32012608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 41, 46, 64, 67, 80, 82, 92, 115, 134, 160, 164, 184, 205, 230, 268, 320, 328, 335, 368, 410, 460, 536, 656, 670, 736, 820, 920, 943, 1072, 1312, 1340, 1472, 1541, 1640, 1840, 1886, 2144, 2624, 2680, 2747, 3082, 3280, 3680, 3772, 4288, 4715, 5360, 5494, 6164, 6560, 7360, 7544, 7705, 9430, 10720, 10988, 12328, 13120, 13735, 15088, 15410, 18860, 21440, 21976, 24656, 27470, 30176, 30820, 37720, 43952, 49312, 54940, 60352, 61640, 63181, 75440, 87904, 98624, 109880, 123280, 126362, 150880, 175808, 219760, 246560, 252724, 301760, 315905, 439520, 493120, 505448, 631810, 879040, 1010896, 1263620, 2021792, 2527240, 4043584, 5054480, 10108960, 20217920]

約数ペア:

[(1, 20217920), (2, 10108960), (4, 5054480), (5, 4043584), (8, 2527240), (10, 2021792), (16, 1263620), (20, 1010896), (23, 879040), (32, 631810), (40, 505448), (41, 493120), (46, 439520), (64, 315905), (67, 301760), (80, 252724), (82, 246560), (92, 219760), (115, 175808), (134, 150880), (160, 126362), (164, 123280), (184, 109880), (205, 98624), (230, 87904), (268, 75440), (320, 63181), (328, 61640), (335, 60352), (368, 54940), (410, 49312), (460, 43952), (536, 37720), (656, 30820), (670, 30176), (736, 27470), (820, 24656), (920, 21976), (943, 21440), (1072, 18860), (1312, 15410), (1340, 15088), (1472, 13735), (1541, 13120), (1640, 12328), (1840, 10988), (1886, 10720), (2144, 9430), (2624, 7705), (2680, 7544), (2747, 7360), (3082, 6560), (3280, 6164), (3680, 5494), (3772, 5360), (4288, 4715)]