21131572

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1$

素因数の和:221

約数の個数: 96

約数和(自身を含む): 50964480

約数和(自身を除く): 29832908

約数列:

[1, 2, 4, 7, 11, 14, 19, 22, 23, 28, 38, 44, 46, 76, 77, 92, 133, 154, 157, 161, 209, 253, 266, 308, 314, 322, 418, 437, 506, 532, 628, 644, 836, 874, 1012, 1099, 1463, 1727, 1748, 1771, 2198, 2926, 2983, 3059, 3454, 3542, 3611, 4396, 4807, 5852, 5966, 6118, 6908, 7084, 7222, 9614, 11932, 12089, 12236, 14444, 19228, 20881, 24178, 25277, 32813, 33649, 39721, 41762, 48356, 50554, 65626, 67298, 68609, 79442, 83524, 101108, 131252, 134596, 137218, 158884, 229691, 274436, 278047, 459382, 480263, 556094, 754699, 918764, 960526, 1112188, 1509398, 1921052, 3018796, 5282893, 10565786, 21131572]

約数ペア:

[(1, 21131572), (2, 10565786), (4, 5282893), (7, 3018796), (11, 1921052), (14, 1509398), (19, 1112188), (22, 960526), (23, 918764), (28, 754699), (38, 556094), (44, 480263), (46, 459382), (76, 278047), (77, 274436), (92, 229691), (133, 158884), (154, 137218), (157, 134596), (161, 131252), (209, 101108), (253, 83524), (266, 79442), (308, 68609), (314, 67298), (322, 65626), (418, 50554), (437, 48356), (506, 41762), (532, 39721), (628, 33649), (644, 32813), (836, 25277), (874, 24178), (1012, 20881), (1099, 19228), (1463, 14444), (1727, 12236), (1748, 12089), (1771, 11932), (2198, 9614), (2926, 7222), (2983, 7084), (3059, 6908), (3454, 6118), (3542, 5966), (3611, 5852), (4396, 4807)]