21487040

素因数分解:

$2^6\times 5^1\times {\mathrm{83}}^1\times {\mathrm{809}}^1$

素因数の和:909

約数の個数: 56

約数和(自身を含む): 51846480

約数和(自身を除く): 30359440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 83, 160, 166, 320, 332, 415, 664, 809, 830, 1328, 1618, 1660, 2656, 3236, 3320, 4045, 5312, 6472, 6640, 8090, 12944, 13280, 16180, 25888, 26560, 32360, 51776, 64720, 67147, 129440, 134294, 258880, 268588, 335735, 537176, 671470, 1074352, 1342940, 2148704, 2685880, 4297408, 5371760, 10743520, 21487040]

約数ペア:

[(1, 21487040), (2, 10743520), (4, 5371760), (5, 4297408), (8, 2685880), (10, 2148704), (16, 1342940), (20, 1074352), (32, 671470), (40, 537176), (64, 335735), (80, 268588), (83, 258880), (160, 134294), (166, 129440), (320, 67147), (332, 64720), (415, 51776), (664, 32360), (809, 26560), (830, 25888), (1328, 16180), (1618, 13280), (1660, 12944), (2656, 8090), (3236, 6640), (3320, 6472), (4045, 5312)]