20921656

素因数分解:

$2^3\times 7^1\times {\mathrm{547}}^1\times {\mathrm{683}}^1$

素因数の和:1243

約数の個数: 32

約数和(自身を含む): 44979840

約数和(自身を除く): 24058184

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 547, 683, 1094, 1366, 2188, 2732, 3829, 4376, 4781, 5464, 7658, 9562, 15316, 19124, 30632, 38248, 373601, 747202, 1494404, 2615207, 2988808, 5230414, 10460828, 20921656]

約数ペア:

[(1, 20921656), (2, 10460828), (4, 5230414), (7, 2988808), (8, 2615207), (14, 1494404), (28, 747202), (56, 373601), (547, 38248), (683, 30632), (1094, 19124), (1366, 15316), (2188, 9562), (2732, 7658), (3829, 5464), (4376, 4781)]