20431360

素因数分解:

$2^9\times 5^1\times {\mathrm{23}}^1\times {\mathrm{347}}^1$

素因数の和:393

約数の個数: 80

約数和(自身を含む): 51264576

約数和(自身を除く): 30833216

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 64, 80, 92, 115, 128, 160, 184, 230, 256, 320, 347, 368, 460, 512, 640, 694, 736, 920, 1280, 1388, 1472, 1735, 1840, 2560, 2776, 2944, 3470, 3680, 5552, 5888, 6940, 7360, 7981, 11104, 11776, 13880, 14720, 15962, 22208, 27760, 29440, 31924, 39905, 44416, 55520, 58880, 63848, 79810, 88832, 111040, 127696, 159620, 177664, 222080, 255392, 319240, 444160, 510784, 638480, 888320, 1021568, 1276960, 2043136, 2553920, 4086272, 5107840, 10215680, 20431360]

約数ペア:

[(1, 20431360), (2, 10215680), (4, 5107840), (5, 4086272), (8, 2553920), (10, 2043136), (16, 1276960), (20, 1021568), (23, 888320), (32, 638480), (40, 510784), (46, 444160), (64, 319240), (80, 255392), (92, 222080), (115, 177664), (128, 159620), (160, 127696), (184, 111040), (230, 88832), (256, 79810), (320, 63848), (347, 58880), (368, 55520), (460, 44416), (512, 39905), (640, 31924), (694, 29440), (736, 27760), (920, 22208), (1280, 15962), (1388, 14720), (1472, 13880), (1735, 11776), (1840, 11104), (2560, 7981), (2776, 7360), (2944, 6940), (3470, 5888), (3680, 5552)]