20187821968

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{181}}^1\times {\mathrm{271}}^1\times {\mathrm{887}}^1$

素因数の和:1376

約数の個数: 80

約数和(自身を含む): 40882383360

約数和(自身を除く): 20694561392

約数列:

[1, 2, 4, 8, 16, 29, 58, 116, 181, 232, 271, 362, 464, 542, 724, 887, 1084, 1448, 1774, 2168, 2896, 3548, 4336, 5249, 7096, 7859, 10498, 14192, 15718, 20996, 25723, 31436, 41992, 49051, 51446, 62872, 83984, 98102, 102892, 125744, 160547, 196204, 205784, 240377, 321094, 392408, 411568, 480754, 642188, 784816, 961508, 1284376, 1422479, 1923016, 2568752, 2844958, 3846032, 4655863, 5689916, 6970933, 9311726, 11379832, 13941866, 18623452, 22759664, 27883732, 37246904, 43508237, 55767464, 74493808, 87016474, 111534928, 174032948, 348065896, 696131792, 1261738873, 2523477746, 5046955492, 10093910984, 20187821968]

約数ペア:

[(1, 20187821968), (2, 10093910984), (4, 5046955492), (8, 2523477746), (16, 1261738873), (29, 696131792), (58, 348065896), (116, 174032948), (181, 111534928), (232, 87016474), (271, 74493808), (362, 55767464), (464, 43508237), (542, 37246904), (724, 27883732), (887, 22759664), (1084, 18623452), (1448, 13941866), (1774, 11379832), (2168, 9311726), (2896, 6970933), (3548, 5689916), (4336, 4655863), (5249, 3846032), (7096, 2844958), (7859, 2568752), (10498, 1923016), (14192, 1422479), (15718, 1284376), (20996, 961508), (25723, 784816), (31436, 642188), (41992, 480754), (49051, 411568), (51446, 392408), (62872, 321094), (83984, 240377), (98102, 205784), (102892, 196204), (125744, 160547)]