21006972

素因数分解:

$2^2\times 3^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{751}}^1$

素因数の和:808

約数の個数: 96

約数和(自身を含む): 64010240

約数和(自身を除く): 43003268

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 36, 37, 42, 54, 63, 74, 84, 108, 111, 126, 148, 189, 222, 252, 259, 333, 378, 444, 518, 666, 751, 756, 777, 999, 1036, 1332, 1502, 1554, 1998, 2253, 2331, 3004, 3108, 3996, 4506, 4662, 5257, 6759, 6993, 9012, 9324, 10514, 13518, 13986, 15771, 20277, 21028, 27036, 27787, 27972, 31542, 40554, 47313, 55574, 63084, 81108, 83361, 94626, 111148, 141939, 166722, 189252, 194509, 250083, 283878, 333444, 389018, 500166, 567756, 583527, 750249, 778036, 1000332, 1167054, 1500498, 1750581, 2334108, 3000996, 3501162, 5251743, 7002324, 10503486, 21006972]

約数ペア:

[(1, 21006972), (2, 10503486), (3, 7002324), (4, 5251743), (6, 3501162), (7, 3000996), (9, 2334108), (12, 1750581), (14, 1500498), (18, 1167054), (21, 1000332), (27, 778036), (28, 750249), (36, 583527), (37, 567756), (42, 500166), (54, 389018), (63, 333444), (74, 283878), (84, 250083), (108, 194509), (111, 189252), (126, 166722), (148, 141939), (189, 111148), (222, 94626), (252, 83361), (259, 81108), (333, 63084), (378, 55574), (444, 47313), (518, 40554), (666, 31542), (751, 27972), (756, 27787), (777, 27036), (999, 21028), (1036, 20277), (1332, 15771), (1502, 13986), (1554, 13518), (1998, 10514), (2253, 9324), (2331, 9012), (3004, 6993), (3108, 6759), (3996, 5257), (4506, 4662)]