20870512

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{5281}}^1$

素因数の和:5321

約数の個数: 40

約数和(自身を含む): 45847760

約数和(自身を除く): 24977248

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 52, 76, 104, 152, 208, 247, 304, 494, 988, 1976, 3952, 5281, 10562, 21124, 42248, 68653, 84496, 100339, 137306, 200678, 274612, 401356, 549224, 802712, 1098448, 1304407, 1605424, 2608814, 5217628, 10435256, 20870512]

約数ペア:

[(1, 20870512), (2, 10435256), (4, 5217628), (8, 2608814), (13, 1605424), (16, 1304407), (19, 1098448), (26, 802712), (38, 549224), (52, 401356), (76, 274612), (104, 200678), (152, 137306), (208, 100339), (247, 84496), (304, 68653), (494, 42248), (988, 21124), (1976, 10562), (3952, 5281)]