19910916

素因数分解:

$2^2\times 3^2\times {\mathrm{23}}^1\times {\mathrm{139}}^1\times {\mathrm{173}}^1$

素因数の和:345

約数の個数: 72

約数和(自身を含む): 53202240

約数和(自身を除く): 33291324

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 23, 36, 46, 69, 92, 138, 139, 173, 207, 276, 278, 346, 414, 417, 519, 556, 692, 828, 834, 1038, 1251, 1557, 1668, 2076, 2502, 3114, 3197, 3979, 5004, 6228, 6394, 7958, 9591, 11937, 12788, 15916, 19182, 23874, 24047, 28773, 35811, 38364, 47748, 48094, 57546, 71622, 72141, 96188, 115092, 143244, 144282, 216423, 288564, 432846, 553081, 865692, 1106162, 1659243, 2212324, 3318486, 4977729, 6636972, 9955458, 19910916]

約数ペア:

[(1, 19910916), (2, 9955458), (3, 6636972), (4, 4977729), (6, 3318486), (9, 2212324), (12, 1659243), (18, 1106162), (23, 865692), (36, 553081), (46, 432846), (69, 288564), (92, 216423), (138, 144282), (139, 143244), (173, 115092), (207, 96188), (276, 72141), (278, 71622), (346, 57546), (414, 48094), (417, 47748), (519, 38364), (556, 35811), (692, 28773), (828, 24047), (834, 23874), (1038, 19182), (1251, 15916), (1557, 12788), (1668, 11937), (2076, 9591), (2502, 7958), (3114, 6394), (3197, 6228), (3979, 5004)]