80871220

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{487}}^1$

素因数の和:557

約数の個数: 72

約数和(自身を含む): 187415424

約数和(自身を除く): 106544204

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 38, 46, 76, 92, 95, 115, 190, 230, 361, 380, 437, 460, 487, 722, 874, 974, 1444, 1748, 1805, 1948, 2185, 2435, 3610, 4370, 4870, 7220, 8303, 8740, 9253, 9740, 11201, 16606, 18506, 22402, 33212, 37012, 41515, 44804, 46265, 56005, 83030, 92530, 112010, 166060, 175807, 185060, 212819, 224020, 351614, 425638, 703228, 851276, 879035, 1064095, 1758070, 2128190, 3516140, 4043561, 4256380, 8087122, 16174244, 20217805, 40435610, 80871220]

約数ペア:

[(1, 80871220), (2, 40435610), (4, 20217805), (5, 16174244), (10, 8087122), (19, 4256380), (20, 4043561), (23, 3516140), (38, 2128190), (46, 1758070), (76, 1064095), (92, 879035), (95, 851276), (115, 703228), (190, 425638), (230, 351614), (361, 224020), (380, 212819), (437, 185060), (460, 175807), (487, 166060), (722, 112010), (874, 92530), (974, 83030), (1444, 56005), (1748, 46265), (1805, 44804), (1948, 41515), (2185, 37012), (2435, 33212), (3610, 22402), (4370, 18506), (4870, 16606), (7220, 11201), (8303, 9740), (8740, 9253)]