21695940

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{257}}^1$

素因数の和:346

約数の個数: 144

約数和(自身を含む): 76632192

約数和(自身を除く): 54936252

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 67, 70, 84, 90, 105, 126, 134, 140, 180, 201, 210, 252, 257, 268, 315, 335, 402, 420, 469, 514, 603, 630, 670, 771, 804, 938, 1005, 1028, 1206, 1260, 1285, 1340, 1407, 1542, 1799, 1876, 2010, 2313, 2345, 2412, 2570, 2814, 3015, 3084, 3598, 3855, 4020, 4221, 4626, 4690, 5140, 5397, 5628, 6030, 7035, 7196, 7710, 8442, 8995, 9252, 9380, 10794, 11565, 12060, 14070, 15420, 16191, 16884, 17219, 17990, 21105, 21588, 23130, 26985, 28140, 32382, 34438, 35980, 42210, 46260, 51657, 53970, 64764, 68876, 80955, 84420, 86095, 103314, 107940, 120533, 154971, 161910, 172190, 206628, 241066, 258285, 309942, 323820, 344380, 361599, 482132, 516570, 602665, 619884, 723198, 774855, 1033140, 1084797, 1205330, 1446396, 1549710, 1807995, 2169594, 2410660, 3099420, 3615990, 4339188, 5423985, 7231980, 10847970, 21695940]

約数ペア:

[(1, 21695940), (2, 10847970), (3, 7231980), (4, 5423985), (5, 4339188), (6, 3615990), (7, 3099420), (9, 2410660), (10, 2169594), (12, 1807995), (14, 1549710), (15, 1446396), (18, 1205330), (20, 1084797), (21, 1033140), (28, 774855), (30, 723198), (35, 619884), (36, 602665), (42, 516570), (45, 482132), (60, 361599), (63, 344380), (67, 323820), (70, 309942), (84, 258285), (90, 241066), (105, 206628), (126, 172190), (134, 161910), (140, 154971), (180, 120533), (201, 107940), (210, 103314), (252, 86095), (257, 84420), (268, 80955), (315, 68876), (335, 64764), (402, 53970), (420, 51657), (469, 46260), (514, 42210), (603, 35980), (630, 34438), (670, 32382), (771, 28140), (804, 26985), (938, 23130), (1005, 21588), (1028, 21105), (1206, 17990), (1260, 17219), (1285, 16884), (1340, 16191), (1407, 15420), (1542, 14070), (1799, 12060), (1876, 11565), (2010, 10794), (2313, 9380), (2345, 9252), (2412, 8995), (2570, 8442), (2814, 7710), (3015, 7196), (3084, 7035), (3598, 6030), (3855, 5628), (4020, 5397), (4221, 5140), (4626, 4690)]