78234520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{21493}}^1$

素因数の和:21524

約数の個数: 64

約数和(自身を含む): 216659520

約数和(自身を除く): 138425000

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 91, 104, 130, 140, 182, 260, 280, 364, 455, 520, 728, 910, 1820, 3640, 21493, 42986, 85972, 107465, 150451, 171944, 214930, 279409, 300902, 429860, 558818, 601804, 752255, 859720, 1117636, 1203608, 1397045, 1504510, 1955863, 2235272, 2794090, 3009020, 3911726, 5588180, 6018040, 7823452, 9779315, 11176360, 15646904, 19558630, 39117260, 78234520]

約数ペア:

[(1, 78234520), (2, 39117260), (4, 19558630), (5, 15646904), (7, 11176360), (8, 9779315), (10, 7823452), (13, 6018040), (14, 5588180), (20, 3911726), (26, 3009020), (28, 2794090), (35, 2235272), (40, 1955863), (52, 1504510), (56, 1397045), (65, 1203608), (70, 1117636), (91, 859720), (104, 752255), (130, 601804), (140, 558818), (182, 429860), (260, 300902), (280, 279409), (364, 214930), (455, 171944), (520, 150451), (728, 107465), (910, 85972), (1820, 42986), (3640, 21493)]