81452240

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1307}}^1$

素因数の和:1380

約数の個数: 80

約数和(自身を含む): 204361920

約数和(自身を除く): 122909680

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 41, 76, 80, 82, 95, 152, 164, 190, 205, 304, 328, 380, 410, 656, 760, 779, 820, 1307, 1520, 1558, 1640, 2614, 3116, 3280, 3895, 5228, 6232, 6535, 7790, 10456, 12464, 13070, 15580, 20912, 24833, 26140, 31160, 49666, 52280, 53587, 62320, 99332, 104560, 107174, 124165, 198664, 214348, 248330, 267935, 397328, 428696, 496660, 535870, 857392, 993320, 1018153, 1071740, 1986640, 2036306, 2143480, 4072612, 4286960, 5090765, 8145224, 10181530, 16290448, 20363060, 40726120, 81452240]

約数ペア:

[(1, 81452240), (2, 40726120), (4, 20363060), (5, 16290448), (8, 10181530), (10, 8145224), (16, 5090765), (19, 4286960), (20, 4072612), (38, 2143480), (40, 2036306), (41, 1986640), (76, 1071740), (80, 1018153), (82, 993320), (95, 857392), (152, 535870), (164, 496660), (190, 428696), (205, 397328), (304, 267935), (328, 248330), (380, 214348), (410, 198664), (656, 124165), (760, 107174), (779, 104560), (820, 99332), (1307, 62320), (1520, 53587), (1558, 52280), (1640, 49666), (2614, 31160), (3116, 26140), (3280, 24833), (3895, 20912), (5228, 15580), (6232, 13070), (6535, 12464), (7790, 10456)]