21407072

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{257}}^1$

素因数の和:423

約数の個数: 48

約数和(自身を含む): 44861040

約数和(自身を除く): 23453968

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 76, 137, 152, 257, 274, 304, 514, 548, 608, 1028, 1096, 2056, 2192, 2603, 4112, 4384, 4883, 5206, 8224, 9766, 10412, 19532, 20824, 35209, 39064, 41648, 70418, 78128, 83296, 140836, 156256, 281672, 563344, 668971, 1126688, 1337942, 2675884, 5351768, 10703536, 21407072]

約数ペア:

[(1, 21407072), (2, 10703536), (4, 5351768), (8, 2675884), (16, 1337942), (19, 1126688), (32, 668971), (38, 563344), (76, 281672), (137, 156256), (152, 140836), (257, 83296), (274, 78128), (304, 70418), (514, 41648), (548, 39064), (608, 35209), (1028, 20824), (1096, 19532), (2056, 10412), (2192, 9766), (2603, 8224), (4112, 5206), (4384, 4883)]