81562240

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4111}}^1$

素因数の和:4161

約数の個数: 64

約数和(自身を含む): 201323520

約数和(自身を除く): 119761280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 310, 320, 496, 620, 640, 992, 1240, 1984, 2480, 3968, 4111, 4960, 8222, 9920, 16444, 19840, 20555, 32888, 41110, 65776, 82220, 127441, 131552, 164440, 254882, 263104, 328880, 509764, 526208, 637205, 657760, 1019528, 1274410, 1315520, 2039056, 2548820, 2631040, 4078112, 5097640, 8156224, 10195280, 16312448, 20390560, 40781120, 81562240]

約数ペア:

[(1, 81562240), (2, 40781120), (4, 20390560), (5, 16312448), (8, 10195280), (10, 8156224), (16, 5097640), (20, 4078112), (31, 2631040), (32, 2548820), (40, 2039056), (62, 1315520), (64, 1274410), (80, 1019528), (124, 657760), (128, 637205), (155, 526208), (160, 509764), (248, 328880), (310, 263104), (320, 254882), (496, 164440), (620, 131552), (640, 127441), (992, 82220), (1240, 65776), (1984, 41110), (2480, 32888), (3968, 20555), (4111, 19840), (4960, 16444), (8222, 9920)]