18916990

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:157

約数の個数: 64

約数和(自身を含む): 37920960

約数和(自身を除く): 19003970

約数列:

[1, 2, 5, 10, 29, 37, 41, 43, 58, 74, 82, 86, 145, 185, 205, 215, 290, 370, 410, 430, 1073, 1189, 1247, 1517, 1591, 1763, 2146, 2378, 2494, 3034, 3182, 3526, 5365, 5945, 6235, 7585, 7955, 8815, 10730, 11890, 12470, 15170, 15910, 17630, 43993, 46139, 51127, 65231, 87986, 92278, 102254, 130462, 219965, 230695, 255635, 326155, 439930, 461390, 511270, 652310, 1891699, 3783398, 9458495, 18916990]

約数ペア:

[(1, 18916990), (2, 9458495), (5, 3783398), (10, 1891699), (29, 652310), (37, 511270), (41, 461390), (43, 439930), (58, 326155), (74, 255635), (82, 230695), (86, 219965), (145, 130462), (185, 102254), (205, 92278), (215, 87986), (290, 65231), (370, 51127), (410, 46139), (430, 43993), (1073, 17630), (1189, 15910), (1247, 15170), (1517, 12470), (1591, 11890), (1763, 10730), (2146, 8815), (2378, 7955), (2494, 7585), (3034, 6235), (3182, 5945), (3526, 5365)]