21128240

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1301}}^1$

素因数の和:1350

約数の個数: 80

約数和(自身を含む): 58121280

約数和(自身を除く): 36993040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 29, 35, 40, 56, 58, 70, 80, 112, 116, 140, 145, 203, 232, 280, 290, 406, 464, 560, 580, 812, 1015, 1160, 1301, 1624, 2030, 2320, 2602, 3248, 4060, 5204, 6505, 8120, 9107, 10408, 13010, 16240, 18214, 20816, 26020, 36428, 37729, 45535, 52040, 72856, 75458, 91070, 104080, 145712, 150916, 182140, 188645, 264103, 301832, 364280, 377290, 528206, 603664, 728560, 754580, 1056412, 1320515, 1509160, 2112824, 2641030, 3018320, 4225648, 5282060, 10564120, 21128240]

約数ペア:

[(1, 21128240), (2, 10564120), (4, 5282060), (5, 4225648), (7, 3018320), (8, 2641030), (10, 2112824), (14, 1509160), (16, 1320515), (20, 1056412), (28, 754580), (29, 728560), (35, 603664), (40, 528206), (56, 377290), (58, 364280), (70, 301832), (80, 264103), (112, 188645), (116, 182140), (140, 150916), (145, 145712), (203, 104080), (232, 91070), (280, 75458), (290, 72856), (406, 52040), (464, 45535), (560, 37729), (580, 36428), (812, 26020), (1015, 20816), (1160, 18214), (1301, 16240), (1624, 13010), (2030, 10408), (2320, 9107), (2602, 8120), (3248, 6505), (4060, 5204)]