21308256

素因数分解:

$2^5\times 3^2\times {\mathrm{241}}^1\times {\mathrm{307}}^1$

素因数の和:564

約数の個数: 72

約数和(自身を含む): 61044984

約数和(自身を除く): 39736728

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 72, 96, 144, 241, 288, 307, 482, 614, 723, 921, 964, 1228, 1446, 1842, 1928, 2169, 2456, 2763, 2892, 3684, 3856, 4338, 4912, 5526, 5784, 7368, 7712, 8676, 9824, 11052, 11568, 14736, 17352, 22104, 23136, 29472, 34704, 44208, 69408, 73987, 88416, 147974, 221961, 295948, 443922, 591896, 665883, 887844, 1183792, 1331766, 1775688, 2367584, 2663532, 3551376, 5327064, 7102752, 10654128, 21308256]

約数ペア:

[(1, 21308256), (2, 10654128), (3, 7102752), (4, 5327064), (6, 3551376), (8, 2663532), (9, 2367584), (12, 1775688), (16, 1331766), (18, 1183792), (24, 887844), (32, 665883), (36, 591896), (48, 443922), (72, 295948), (96, 221961), (144, 147974), (241, 88416), (288, 73987), (307, 69408), (482, 44208), (614, 34704), (723, 29472), (921, 23136), (964, 22104), (1228, 17352), (1446, 14736), (1842, 11568), (1928, 11052), (2169, 9824), (2456, 8676), (2763, 7712), (2892, 7368), (3684, 5784), (3856, 5526), (4338, 4912)]