21252420

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{167}}^1$

素因数の和:290

約数の個数: 144

約数和(自身を含む): 74850048

約数和(自身を除く): 53597628

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, 70, 84, 90, 101, 105, 126, 140, 167, 180, 202, 210, 252, 303, 315, 334, 404, 420, 501, 505, 606, 630, 668, 707, 835, 909, 1002, 1010, 1169, 1212, 1260, 1414, 1503, 1515, 1670, 1818, 2004, 2020, 2121, 2338, 2505, 2828, 3006, 3030, 3340, 3507, 3535, 3636, 4242, 4545, 4676, 5010, 5845, 6012, 6060, 6363, 7014, 7070, 7515, 8484, 9090, 10020, 10521, 10605, 11690, 12726, 14028, 14140, 15030, 16867, 17535, 18180, 21042, 21210, 23380, 25452, 30060, 31815, 33734, 35070, 42084, 42420, 50601, 52605, 63630, 67468, 70140, 84335, 101202, 105210, 118069, 127260, 151803, 168670, 202404, 210420, 236138, 253005, 303606, 337340, 354207, 472276, 506010, 590345, 607212, 708414, 759015, 1012020, 1062621, 1180690, 1416828, 1518030, 1771035, 2125242, 2361380, 3036060, 3542070, 4250484, 5313105, 7084140, 10626210, 21252420]

約数ペア:

[(1, 21252420), (2, 10626210), (3, 7084140), (4, 5313105), (5, 4250484), (6, 3542070), (7, 3036060), (9, 2361380), (10, 2125242), (12, 1771035), (14, 1518030), (15, 1416828), (18, 1180690), (20, 1062621), (21, 1012020), (28, 759015), (30, 708414), (35, 607212), (36, 590345), (42, 506010), (45, 472276), (60, 354207), (63, 337340), (70, 303606), (84, 253005), (90, 236138), (101, 210420), (105, 202404), (126, 168670), (140, 151803), (167, 127260), (180, 118069), (202, 105210), (210, 101202), (252, 84335), (303, 70140), (315, 67468), (334, 63630), (404, 52605), (420, 50601), (501, 42420), (505, 42084), (606, 35070), (630, 33734), (668, 31815), (707, 30060), (835, 25452), (909, 23380), (1002, 21210), (1010, 21042), (1169, 18180), (1212, 17535), (1260, 16867), (1414, 15030), (1503, 14140), (1515, 14028), (1670, 12726), (1818, 11690), (2004, 10605), (2020, 10521), (2121, 10020), (2338, 9090), (2505, 8484), (2828, 7515), (3006, 7070), (3030, 7014), (3340, 6363), (3507, 6060), (3535, 6012), (3636, 5845), (4242, 5010), (4545, 4676)]