20328320

素因数分解:

$2^7\times 5^1\times {\mathrm{23}}^1\times {\mathrm{1381}}^1$

素因数の和:1423

約数の個数: 64

約数和(自身を含む): 50747040

約数和(自身を除く): 30418720

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, 1381, 1472, 1840, 2762, 2944, 3680, 5524, 6905, 7360, 11048, 13810, 14720, 22096, 27620, 31763, 44192, 55240, 63526, 88384, 110480, 127052, 158815, 176768, 220960, 254104, 317630, 441920, 508208, 635260, 883840, 1016416, 1270520, 2032832, 2541040, 4065664, 5082080, 10164160, 20328320]

約数ペア:

[(1, 20328320), (2, 10164160), (4, 5082080), (5, 4065664), (8, 2541040), (10, 2032832), (16, 1270520), (20, 1016416), (23, 883840), (32, 635260), (40, 508208), (46, 441920), (64, 317630), (80, 254104), (92, 220960), (115, 176768), (128, 158815), (160, 127052), (184, 110480), (230, 88384), (320, 63526), (368, 55240), (460, 44192), (640, 31763), (736, 27620), (920, 22096), (1381, 14720), (1472, 13810), (1840, 11048), (2762, 7360), (2944, 6905), (3680, 5524)]