80390440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{4987}}^1$

素因数の和:5042

約数の個数: 64

約数和(自身を含む): 201116160

約数和(自身を除く): 120725720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 248, 260, 310, 403, 520, 620, 806, 1240, 1612, 2015, 3224, 4030, 4987, 8060, 9974, 16120, 19948, 24935, 39896, 49870, 64831, 99740, 129662, 154597, 199480, 259324, 309194, 324155, 518648, 618388, 648310, 772985, 1236776, 1296620, 1545970, 2009761, 2593240, 3091940, 4019522, 6183880, 8039044, 10048805, 16078088, 20097610, 40195220, 80390440]

約数ペア:

[(1, 80390440), (2, 40195220), (4, 20097610), (5, 16078088), (8, 10048805), (10, 8039044), (13, 6183880), (20, 4019522), (26, 3091940), (31, 2593240), (40, 2009761), (52, 1545970), (62, 1296620), (65, 1236776), (104, 772985), (124, 648310), (130, 618388), (155, 518648), (248, 324155), (260, 309194), (310, 259324), (403, 199480), (520, 154597), (620, 129662), (806, 99740), (1240, 64831), (1612, 49870), (2015, 39896), (3224, 24935), (4030, 19948), (4987, 16120), (8060, 9974)]