21390516

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{2927}}^1$

素因数の和:2973

約数の個数: 72

約数和(自身を含む): 63947520

約数和(自身を除く): 42557004

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 29, 36, 42, 58, 63, 84, 87, 116, 126, 174, 203, 252, 261, 348, 406, 522, 609, 812, 1044, 1218, 1827, 2436, 2927, 3654, 5854, 7308, 8781, 11708, 17562, 20489, 26343, 35124, 40978, 52686, 61467, 81956, 84883, 105372, 122934, 169766, 184401, 245868, 254649, 339532, 368802, 509298, 594181, 737604, 763947, 1018596, 1188362, 1527894, 1782543, 2376724, 3055788, 3565086, 5347629, 7130172, 10695258, 21390516]

約数ペア:

[(1, 21390516), (2, 10695258), (3, 7130172), (4, 5347629), (6, 3565086), (7, 3055788), (9, 2376724), (12, 1782543), (14, 1527894), (18, 1188362), (21, 1018596), (28, 763947), (29, 737604), (36, 594181), (42, 509298), (58, 368802), (63, 339532), (84, 254649), (87, 245868), (116, 184401), (126, 169766), (174, 122934), (203, 105372), (252, 84883), (261, 81956), (348, 61467), (406, 52686), (522, 40978), (609, 35124), (812, 26343), (1044, 20489), (1218, 17562), (1827, 11708), (2436, 8781), (2927, 7308), (3654, 5854)]