21147210

素因数分解:

$2^1\times 3^3\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{167}}^1$

素因数の和:257

約数の個数: 128

約数和(自身を含む): 65802240

約数和(自身を除く): 44655030

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 30, 35, 42, 45, 54, 63, 67, 70, 90, 105, 126, 134, 135, 167, 189, 201, 210, 270, 315, 334, 335, 378, 402, 469, 501, 603, 630, 670, 835, 938, 945, 1002, 1005, 1169, 1206, 1407, 1503, 1670, 1809, 1890, 2010, 2338, 2345, 2505, 2814, 3006, 3015, 3507, 3618, 4221, 4509, 4690, 5010, 5845, 6030, 7014, 7035, 7515, 8442, 9018, 9045, 10521, 11189, 11690, 12663, 14070, 15030, 17535, 18090, 21042, 21105, 22378, 22545, 25326, 31563, 33567, 35070, 42210, 45090, 52605, 55945, 63126, 63315, 67134, 78323, 100701, 105210, 111890, 126630, 156646, 157815, 167835, 201402, 234969, 302103, 315630, 335670, 391615, 469938, 503505, 604206, 704907, 783230, 1007010, 1174845, 1409814, 1510515, 2114721, 2349690, 3021030, 3524535, 4229442, 7049070, 10573605, 21147210]

約数ペア:

[(1, 21147210), (2, 10573605), (3, 7049070), (5, 4229442), (6, 3524535), (7, 3021030), (9, 2349690), (10, 2114721), (14, 1510515), (15, 1409814), (18, 1174845), (21, 1007010), (27, 783230), (30, 704907), (35, 604206), (42, 503505), (45, 469938), (54, 391615), (63, 335670), (67, 315630), (70, 302103), (90, 234969), (105, 201402), (126, 167835), (134, 157815), (135, 156646), (167, 126630), (189, 111890), (201, 105210), (210, 100701), (270, 78323), (315, 67134), (334, 63315), (335, 63126), (378, 55945), (402, 52605), (469, 45090), (501, 42210), (603, 35070), (630, 33567), (670, 31563), (835, 25326), (938, 22545), (945, 22378), (1002, 21105), (1005, 21042), (1169, 18090), (1206, 17535), (1407, 15030), (1503, 14070), (1670, 12663), (1809, 11690), (1890, 11189), (2010, 10521), (2338, 9045), (2345, 9018), (2505, 8442), (2814, 7515), (3006, 7035), (3015, 7014), (3507, 6030), (3618, 5845), (4221, 5010), (4509, 4690)]