21416320

素因数分解:

$2^7\times 5^1\times {\mathrm{109}}^1\times {\mathrm{307}}^1$

素因数の和:435

約数の個数: 64

約数和(自身を含む): 51836400

約数和(自身を除く): 30420080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 109, 128, 160, 218, 307, 320, 436, 545, 614, 640, 872, 1090, 1228, 1535, 1744, 2180, 2456, 3070, 3488, 4360, 4912, 6140, 6976, 8720, 9824, 12280, 13952, 17440, 19648, 24560, 33463, 34880, 39296, 49120, 66926, 69760, 98240, 133852, 167315, 196480, 267704, 334630, 535408, 669260, 1070816, 1338520, 2141632, 2677040, 4283264, 5354080, 10708160, 21416320]

約数ペア:

[(1, 21416320), (2, 10708160), (4, 5354080), (5, 4283264), (8, 2677040), (10, 2141632), (16, 1338520), (20, 1070816), (32, 669260), (40, 535408), (64, 334630), (80, 267704), (109, 196480), (128, 167315), (160, 133852), (218, 98240), (307, 69760), (320, 66926), (436, 49120), (545, 39296), (614, 34880), (640, 33463), (872, 24560), (1090, 19648), (1228, 17440), (1535, 13952), (1744, 12280), (2180, 9824), (2456, 8720), (3070, 6976), (3488, 6140), (4360, 4912)]