21695360

素因数分解:

$2^7\times 5^1\times {\mathrm{109}}^1\times {\mathrm{311}}^1$

素因数の和:439

約数の個数: 64

約数和(自身を含む): 52509600

約数和(自身を除く): 30814240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 109, 128, 160, 218, 311, 320, 436, 545, 622, 640, 872, 1090, 1244, 1555, 1744, 2180, 2488, 3110, 3488, 4360, 4976, 6220, 6976, 8720, 9952, 12440, 13952, 17440, 19904, 24880, 33899, 34880, 39808, 49760, 67798, 69760, 99520, 135596, 169495, 199040, 271192, 338990, 542384, 677980, 1084768, 1355960, 2169536, 2711920, 4339072, 5423840, 10847680, 21695360]

約数ペア:

[(1, 21695360), (2, 10847680), (4, 5423840), (5, 4339072), (8, 2711920), (10, 2169536), (16, 1355960), (20, 1084768), (32, 677980), (40, 542384), (64, 338990), (80, 271192), (109, 199040), (128, 169495), (160, 135596), (218, 99520), (311, 69760), (320, 67798), (436, 49760), (545, 39808), (622, 34880), (640, 33899), (872, 24880), (1090, 19904), (1244, 17440), (1555, 13952), (1744, 12440), (2180, 9952), (2488, 8720), (3110, 6976), (3488, 6220), (4360, 4976)]