999440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2$

素因数の和:88

約数の個数: 60

約数和(自身を含む): 2585772

約数和(自身を除く): 1586332

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 310, 403, 496, 520, 620, 806, 961, 1040, 1240, 1612, 1922, 2015, 2480, 3224, 3844, 4030, 4805, 6448, 7688, 8060, 9610, 12493, 15376, 16120, 19220, 24986, 32240, 38440, 49972, 62465, 76880, 99944, 124930, 199888, 249860, 499720, 999440]

約数ペア:

[(1, 999440), (2, 499720), (4, 249860), (5, 199888), (8, 124930), (10, 99944), (13, 76880), (16, 62465), (20, 49972), (26, 38440), (31, 32240), (40, 24986), (52, 19220), (62, 16120), (65, 15376), (80, 12493), (104, 9610), (124, 8060), (130, 7688), (155, 6448), (208, 4805), (248, 4030), (260, 3844), (310, 3224), (403, 2480), (496, 2015), (520, 1922), (620, 1612), (806, 1240), (961, 1040)]