21062916

素因数分解:

$2^2\times 3^4\times 7^1\times {\mathrm{37}}^1\times {\mathrm{251}}^1$

素因数の和:311

約数の個数: 120

約数和(自身を含む): 64886976

約数和(自身を除く): 43824060

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 36, 37, 42, 54, 63, 74, 81, 84, 108, 111, 126, 148, 162, 189, 222, 251, 252, 259, 324, 333, 378, 444, 502, 518, 567, 666, 753, 756, 777, 999, 1004, 1036, 1134, 1332, 1506, 1554, 1757, 1998, 2259, 2268, 2331, 2997, 3012, 3108, 3514, 3996, 4518, 4662, 5271, 5994, 6777, 6993, 7028, 9036, 9287, 9324, 10542, 11988, 13554, 13986, 15813, 18574, 20331, 20979, 21084, 27108, 27861, 27972, 31626, 37148, 40662, 41958, 47439, 55722, 63252, 65009, 81324, 83583, 83916, 94878, 111444, 130018, 142317, 167166, 189756, 195027, 250749, 260036, 284634, 334332, 390054, 501498, 569268, 585081, 752247, 780108, 1002996, 1170162, 1504494, 1755243, 2340324, 3008988, 3510486, 5265729, 7020972, 10531458, 21062916]

約数ペア:

[(1, 21062916), (2, 10531458), (3, 7020972), (4, 5265729), (6, 3510486), (7, 3008988), (9, 2340324), (12, 1755243), (14, 1504494), (18, 1170162), (21, 1002996), (27, 780108), (28, 752247), (36, 585081), (37, 569268), (42, 501498), (54, 390054), (63, 334332), (74, 284634), (81, 260036), (84, 250749), (108, 195027), (111, 189756), (126, 167166), (148, 142317), (162, 130018), (189, 111444), (222, 94878), (251, 83916), (252, 83583), (259, 81324), (324, 65009), (333, 63252), (378, 55722), (444, 47439), (502, 41958), (518, 40662), (567, 37148), (666, 31626), (753, 27972), (756, 27861), (777, 27108), (999, 21084), (1004, 20979), (1036, 20331), (1134, 18574), (1332, 15813), (1506, 13986), (1554, 13554), (1757, 11988), (1998, 10542), (2259, 9324), (2268, 9287), (2331, 9036), (2997, 7028), (3012, 6993), (3108, 6777), (3514, 5994), (3996, 5271), (4518, 4662)]