20487978

素因数分解:

$2^1\times 3^4\times 7^2\times {\mathrm{29}}^1\times {\mathrm{89}}^1$

素因数の和:146

約数の個数: 120

約数和(自身を含む): 55865700

約数和(自身を除く): 35377722

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 29, 42, 49, 54, 58, 63, 81, 87, 89, 98, 126, 147, 162, 174, 178, 189, 203, 261, 267, 294, 378, 406, 441, 522, 534, 567, 609, 623, 783, 801, 882, 1134, 1218, 1246, 1323, 1421, 1566, 1602, 1827, 1869, 2349, 2403, 2581, 2646, 2842, 3654, 3738, 3969, 4263, 4361, 4698, 4806, 5162, 5481, 5607, 7209, 7743, 7938, 8526, 8722, 10962, 11214, 12789, 13083, 14418, 15486, 16443, 16821, 18067, 23229, 25578, 26166, 32886, 33642, 36134, 38367, 39249, 46458, 50463, 54201, 69687, 76734, 78498, 100926, 108402, 115101, 117747, 126469, 139374, 162603, 209061, 230202, 235494, 252938, 325206, 353241, 379407, 418122, 487809, 706482, 758814, 975618, 1138221, 1463427, 2276442, 2926854, 3414663, 6829326, 10243989, 20487978]

約数ペア:

[(1, 20487978), (2, 10243989), (3, 6829326), (6, 3414663), (7, 2926854), (9, 2276442), (14, 1463427), (18, 1138221), (21, 975618), (27, 758814), (29, 706482), (42, 487809), (49, 418122), (54, 379407), (58, 353241), (63, 325206), (81, 252938), (87, 235494), (89, 230202), (98, 209061), (126, 162603), (147, 139374), (162, 126469), (174, 117747), (178, 115101), (189, 108402), (203, 100926), (261, 78498), (267, 76734), (294, 69687), (378, 54201), (406, 50463), (441, 46458), (522, 39249), (534, 38367), (567, 36134), (609, 33642), (623, 32886), (783, 26166), (801, 25578), (882, 23229), (1134, 18067), (1218, 16821), (1246, 16443), (1323, 15486), (1421, 14418), (1566, 13083), (1602, 12789), (1827, 11214), (1869, 10962), (2349, 8722), (2403, 8526), (2581, 7938), (2646, 7743), (2842, 7209), (3654, 5607), (3738, 5481), (3969, 5162), (4263, 4806), (4361, 4698)]