20638520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73709}}^1$

素因数の和:73727

約数の個数: 32

約数和(自身を含む): 53071200

約数和(自身を除く): 32432680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 73709, 147418, 294836, 368545, 515963, 589672, 737090, 1031926, 1474180, 2063852, 2579815, 2948360, 4127704, 5159630, 10319260, 20638520]

約数ペア:

[(1, 20638520), (2, 10319260), (4, 5159630), (5, 4127704), (7, 2948360), (8, 2579815), (10, 2063852), (14, 1474180), (20, 1031926), (28, 737090), (35, 589672), (40, 515963), (56, 368545), (70, 294836), (140, 147418), (280, 73709)]