21977228

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{349}}^1$

素因数の和:546

約数の個数: 48

約数和(自身を含む): 47745600

約数和(自身を除く): 25768372

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 173, 182, 346, 349, 364, 692, 698, 1211, 1396, 2249, 2422, 2443, 4498, 4537, 4844, 4886, 8996, 9074, 9772, 15743, 18148, 31486, 31759, 60377, 62972, 63518, 120754, 127036, 241508, 422639, 784901, 845278, 1569802, 1690556, 3139604, 5494307, 10988614, 21977228]

約数ペア:

[(1, 21977228), (2, 10988614), (4, 5494307), (7, 3139604), (13, 1690556), (14, 1569802), (26, 845278), (28, 784901), (52, 422639), (91, 241508), (173, 127036), (182, 120754), (346, 63518), (349, 62972), (364, 60377), (692, 31759), (698, 31486), (1211, 18148), (1396, 15743), (2249, 9772), (2422, 9074), (2443, 8996), (4498, 4886), (4537, 4844)]