21168252

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{167}}^1\times {\mathrm{503}}^1$

素因数の和:687

約数の個数: 72

約数和(自身を含む): 61641216

約数和(自身を除く): 40472964

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 167, 252, 334, 501, 503, 668, 1002, 1006, 1169, 1503, 1509, 2004, 2012, 2338, 3006, 3018, 3507, 3521, 4527, 4676, 6012, 6036, 7014, 7042, 9054, 10521, 10563, 14028, 14084, 18108, 21042, 21126, 31689, 42084, 42252, 63378, 84001, 126756, 168002, 252003, 336004, 504006, 588007, 756009, 1008012, 1176014, 1512018, 1764021, 2352028, 3024036, 3528042, 5292063, 7056084, 10584126, 21168252]

約数ペア:

[(1, 21168252), (2, 10584126), (3, 7056084), (4, 5292063), (6, 3528042), (7, 3024036), (9, 2352028), (12, 1764021), (14, 1512018), (18, 1176014), (21, 1008012), (28, 756009), (36, 588007), (42, 504006), (63, 336004), (84, 252003), (126, 168002), (167, 126756), (252, 84001), (334, 63378), (501, 42252), (503, 42084), (668, 31689), (1002, 21126), (1006, 21042), (1169, 18108), (1503, 14084), (1509, 14028), (2004, 10563), (2012, 10521), (2338, 9054), (3006, 7042), (3018, 7014), (3507, 6036), (3521, 6012), (4527, 4676)]