21220480

素因数分解:

$2^7\times 5^1\times {\mathrm{71}}^1\times {\mathrm{467}}^1$

素因数の和:557

約数の個数: 64

約数和(自身を含む): 51554880

約数和(自身を除く): 30334400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 71, 80, 128, 142, 160, 284, 320, 355, 467, 568, 640, 710, 934, 1136, 1420, 1868, 2272, 2335, 2840, 3736, 4544, 4670, 5680, 7472, 9088, 9340, 11360, 14944, 18680, 22720, 29888, 33157, 37360, 45440, 59776, 66314, 74720, 132628, 149440, 165785, 265256, 298880, 331570, 530512, 663140, 1061024, 1326280, 2122048, 2652560, 4244096, 5305120, 10610240, 21220480]

約数ペア:

[(1, 21220480), (2, 10610240), (4, 5305120), (5, 4244096), (8, 2652560), (10, 2122048), (16, 1326280), (20, 1061024), (32, 663140), (40, 530512), (64, 331570), (71, 298880), (80, 265256), (128, 165785), (142, 149440), (160, 132628), (284, 74720), (320, 66314), (355, 59776), (467, 45440), (568, 37360), (640, 33157), (710, 29888), (934, 22720), (1136, 18680), (1420, 14944), (1868, 11360), (2272, 9340), (2335, 9088), (2840, 7472), (3736, 5680), (4544, 4670)]