21245840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{3449}}^1$

素因数の和:3480

約数の個数: 80

約数和(自身を含む): 61603200

約数和(自身を除く): 40357360

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 80, 88, 110, 112, 140, 154, 176, 220, 280, 308, 385, 440, 560, 616, 770, 880, 1232, 1540, 3080, 3449, 6160, 6898, 13796, 17245, 24143, 27592, 34490, 37939, 48286, 55184, 68980, 75878, 96572, 120715, 137960, 151756, 189695, 193144, 241430, 265573, 275920, 303512, 379390, 386288, 482860, 531146, 607024, 758780, 965720, 1062292, 1327865, 1517560, 1931440, 2124584, 2655730, 3035120, 4249168, 5311460, 10622920, 21245840]

約数ペア:

[(1, 21245840), (2, 10622920), (4, 5311460), (5, 4249168), (7, 3035120), (8, 2655730), (10, 2124584), (11, 1931440), (14, 1517560), (16, 1327865), (20, 1062292), (22, 965720), (28, 758780), (35, 607024), (40, 531146), (44, 482860), (55, 386288), (56, 379390), (70, 303512), (77, 275920), (80, 265573), (88, 241430), (110, 193144), (112, 189695), (140, 151756), (154, 137960), (176, 120715), (220, 96572), (280, 75878), (308, 68980), (385, 55184), (440, 48286), (560, 37939), (616, 34490), (770, 27592), (880, 24143), (1232, 17245), (1540, 13796), (3080, 6898), (3449, 6160)]