81820160

素因数分解:

$2^9\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1031}}^1$

素因数の和:1085

約数の個数: 80

約数和(自身を含む): 202701312

約数和(自身を除く): 120881152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 512, 620, 640, 992, 1031, 1240, 1280, 1984, 2062, 2480, 2560, 3968, 4124, 4960, 5155, 7936, 8248, 9920, 10310, 15872, 16496, 19840, 20620, 31961, 32992, 39680, 41240, 63922, 65984, 79360, 82480, 127844, 131968, 159805, 164960, 255688, 263936, 319610, 329920, 511376, 527872, 639220, 659840, 1022752, 1278440, 1319680, 2045504, 2556880, 2639360, 4091008, 5113760, 8182016, 10227520, 16364032, 20455040, 40910080, 81820160]

約数ペア:

[(1, 81820160), (2, 40910080), (4, 20455040), (5, 16364032), (8, 10227520), (10, 8182016), (16, 5113760), (20, 4091008), (31, 2639360), (32, 2556880), (40, 2045504), (62, 1319680), (64, 1278440), (80, 1022752), (124, 659840), (128, 639220), (155, 527872), (160, 511376), (248, 329920), (256, 319610), (310, 263936), (320, 255688), (496, 164960), (512, 159805), (620, 131968), (640, 127844), (992, 82480), (1031, 79360), (1240, 65984), (1280, 63922), (1984, 41240), (2062, 39680), (2480, 32992), (2560, 31961), (3968, 20620), (4124, 19840), (4960, 16496), (5155, 15872), (7936, 10310), (8248, 9920)]