128878880

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61961}}^1$

素因数の和:61989

約数の個数: 48

約数和(自身を含む): 327902904

約数和(自身を除く): 199024024

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 61961, 123922, 247844, 309805, 495688, 619610, 805493, 991376, 1239220, 1610986, 1982752, 2478440, 3221972, 4027465, 4956880, 6443944, 8054930, 9913760, 12887888, 16109860, 25775776, 32219720, 64439440, 128878880]

約数ペア:

[(1, 128878880), (2, 64439440), (4, 32219720), (5, 25775776), (8, 16109860), (10, 12887888), (13, 9913760), (16, 8054930), (20, 6443944), (26, 4956880), (32, 4027465), (40, 3221972), (52, 2478440), (65, 1982752), (80, 1610986), (104, 1239220), (130, 991376), (160, 805493), (208, 619610), (260, 495688), (416, 309805), (520, 247844), (1040, 123922), (2080, 61961)]