21520240

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{463}}^1$

素因数の和:566

約数の個数: 80

約数和(自身を含む): 57996288

約数和(自身を除く): 36476048

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 83, 112, 140, 166, 280, 332, 415, 463, 560, 581, 664, 830, 926, 1162, 1328, 1660, 1852, 2315, 2324, 2905, 3241, 3320, 3704, 4630, 4648, 5810, 6482, 6640, 7408, 9260, 9296, 11620, 12964, 16205, 18520, 23240, 25928, 32410, 37040, 38429, 46480, 51856, 64820, 76858, 129640, 153716, 192145, 259280, 269003, 307432, 384290, 538006, 614864, 768580, 1076012, 1345015, 1537160, 2152024, 2690030, 3074320, 4304048, 5380060, 10760120, 21520240]

約数ペア:

[(1, 21520240), (2, 10760120), (4, 5380060), (5, 4304048), (7, 3074320), (8, 2690030), (10, 2152024), (14, 1537160), (16, 1345015), (20, 1076012), (28, 768580), (35, 614864), (40, 538006), (56, 384290), (70, 307432), (80, 269003), (83, 259280), (112, 192145), (140, 153716), (166, 129640), (280, 76858), (332, 64820), (415, 51856), (463, 46480), (560, 38429), (581, 37040), (664, 32410), (830, 25928), (926, 23240), (1162, 18520), (1328, 16205), (1660, 12964), (1852, 11620), (2315, 9296), (2324, 9260), (2905, 7408), (3241, 6640), (3320, 6482), (3704, 5810), (4630, 4648)]