18979982720

素因数分解:

$2^7\times 5^1\times {\mathrm{23}}^1\times {\mathrm{1289401}}^1$

素因数の和:1289443

約数の個数: 64

約数和(自身を含む): 47346841440

約数和(自身を除く): 28366858720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 64, 80, 92, 115, 128, 160, 184, 230, 320, 368, 460, 640, 736, 920, 1472, 1840, 2944, 3680, 7360, 14720, 1289401, 2578802, 5157604, 6447005, 10315208, 12894010, 20630416, 25788020, 29656223, 41260832, 51576040, 59312446, 82521664, 103152080, 118624892, 148281115, 165043328, 206304160, 237249784, 296562230, 412608320, 474499568, 593124460, 825216640, 948999136, 1186248920, 1897998272, 2372497840, 3795996544, 4744995680, 9489991360, 18979982720]

約数ペア:

[(1, 18979982720), (2, 9489991360), (4, 4744995680), (5, 3795996544), (8, 2372497840), (10, 1897998272), (16, 1186248920), (20, 948999136), (23, 825216640), (32, 593124460), (40, 474499568), (46, 412608320), (64, 296562230), (80, 237249784), (92, 206304160), (115, 165043328), (128, 148281115), (160, 118624892), (184, 103152080), (230, 82521664), (320, 59312446), (368, 51576040), (460, 41260832), (640, 29656223), (736, 25788020), (920, 20630416), (1472, 12894010), (1840, 10315208), (2944, 6447005), (3680, 5157604), (7360, 2578802), (14720, 1289401)]