21000478555

素因数分解:

$5^1\times 7^4\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{4003}}^1$

素因数の和:4078

約数の個数: 80

約数和(自身を含む): 32299787520

約数和(自身を除く): 11299308965

約数列:

[1, 5, 7, 19, 23, 35, 49, 95, 115, 133, 161, 245, 343, 437, 665, 805, 931, 1127, 1715, 2185, 2401, 3059, 4003, 4655, 5635, 6517, 7889, 12005, 15295, 20015, 21413, 28021, 32585, 39445, 45619, 55223, 76057, 92069, 107065, 140105, 149891, 196147, 228095, 276115, 380285, 460345, 532399, 644483, 749455, 980735, 1049237, 1373029, 1749311, 2661995, 3222415, 3726793, 4511381, 5246185, 6865145, 8746555, 9611203, 12245177, 18633965, 22556905, 26087551, 31579667, 48056015, 61225885, 85716239, 130437755, 157898335, 182612857, 221057669, 428581195, 600013673, 913064285, 1105288345, 3000068365, 4200095711, 21000478555]

約数ペア:

[(1, 21000478555), (5, 4200095711), (7, 3000068365), (19, 1105288345), (23, 913064285), (35, 600013673), (49, 428581195), (95, 221057669), (115, 182612857), (133, 157898335), (161, 130437755), (245, 85716239), (343, 61225885), (437, 48056015), (665, 31579667), (805, 26087551), (931, 22556905), (1127, 18633965), (1715, 12245177), (2185, 9611203), (2401, 8746555), (3059, 6865145), (4003, 5246185), (4655, 4511381), (5635, 3726793), (6517, 3222415), (7889, 2661995), (12005, 1749311), (15295, 1373029), (20015, 1049237), (21413, 980735), (28021, 749455), (32585, 644483), (39445, 532399), (45619, 460345), (55223, 380285), (76057, 276115), (92069, 228095), (107065, 196147), (140105, 149891)]