21784980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51869}}^1$

素因数の和:51888

約数の個数: 48

約数和(自身を含む): 69713280

約数和(自身を除く): 47928300

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51869, 103738, 155607, 207476, 259345, 311214, 363083, 518690, 622428, 726166, 778035, 1037380, 1089249, 1452332, 1556070, 1815415, 2178498, 3112140, 3630830, 4356996, 5446245, 7261660, 10892490, 21784980]

約数ペア:

[(1, 21784980), (2, 10892490), (3, 7261660), (4, 5446245), (5, 4356996), (6, 3630830), (7, 3112140), (10, 2178498), (12, 1815415), (14, 1556070), (15, 1452332), (20, 1089249), (21, 1037380), (28, 778035), (30, 726166), (35, 622428), (42, 518690), (60, 363083), (70, 311214), (84, 259345), (105, 207476), (140, 155607), (210, 103738), (420, 51869)]