21640528

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{167}}^1$

素因数の和:284

約数の個数: 80

約数和(自身を含む): 52496640

約数和(自身を除く): 30856112

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 89, 91, 104, 112, 167, 178, 182, 208, 334, 356, 364, 623, 668, 712, 728, 1157, 1169, 1246, 1336, 1424, 1456, 2171, 2314, 2338, 2492, 2672, 4342, 4628, 4676, 4984, 8099, 8684, 9256, 9352, 9968, 14863, 15197, 16198, 17368, 18512, 18704, 29726, 30394, 32396, 34736, 59452, 60788, 64792, 104041, 118904, 121576, 129584, 193219, 208082, 237808, 243152, 386438, 416164, 772876, 832328, 1352533, 1545752, 1664656, 2705066, 3091504, 5410132, 10820264, 21640528]

約数ペア:

[(1, 21640528), (2, 10820264), (4, 5410132), (7, 3091504), (8, 2705066), (13, 1664656), (14, 1545752), (16, 1352533), (26, 832328), (28, 772876), (52, 416164), (56, 386438), (89, 243152), (91, 237808), (104, 208082), (112, 193219), (167, 129584), (178, 121576), (182, 118904), (208, 104041), (334, 64792), (356, 60788), (364, 59452), (623, 34736), (668, 32396), (712, 30394), (728, 29726), (1157, 18704), (1169, 18512), (1246, 17368), (1336, 16198), (1424, 15197), (1456, 14863), (2171, 9968), (2314, 9352), (2338, 9256), (2492, 8684), (2672, 8099), (4342, 4984), (4628, 4676)]