21638720

素因数分解:

$2^6\times 5^1\times {\mathrm{19}}^1\times {\mathrm{3559}}^1$

素因数の和:3595

約数の個数: 56

約数和(自身を含む): 54254400

約数和(自身を除く): 32615680

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 152, 160, 190, 304, 320, 380, 608, 760, 1216, 1520, 3040, 3559, 6080, 7118, 14236, 17795, 28472, 35590, 56944, 67621, 71180, 113888, 135242, 142360, 227776, 270484, 284720, 338105, 540968, 569440, 676210, 1081936, 1138880, 1352420, 2163872, 2704840, 4327744, 5409680, 10819360, 21638720]

約数ペア:

[(1, 21638720), (2, 10819360), (4, 5409680), (5, 4327744), (8, 2704840), (10, 2163872), (16, 1352420), (19, 1138880), (20, 1081936), (32, 676210), (38, 569440), (40, 540968), (64, 338105), (76, 284720), (80, 270484), (95, 227776), (152, 142360), (160, 135242), (190, 113888), (304, 71180), (320, 67621), (380, 56944), (608, 35590), (760, 28472), (1216, 17795), (1520, 14236), (3040, 7118), (3559, 6080)]