21281040

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{2687}}^1$

素因数の和:2717

約数の個数: 120

約数和(自身を含む): 77995008

約数和(自身を除く): 56713968

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 30, 33, 36, 40, 44, 45, 48, 55, 60, 66, 72, 80, 88, 90, 99, 110, 120, 132, 144, 165, 176, 180, 198, 220, 240, 264, 330, 360, 396, 440, 495, 528, 660, 720, 792, 880, 990, 1320, 1584, 1980, 2640, 2687, 3960, 5374, 7920, 8061, 10748, 13435, 16122, 21496, 24183, 26870, 29557, 32244, 40305, 42992, 48366, 53740, 59114, 64488, 80610, 88671, 96732, 107480, 118228, 120915, 128976, 147785, 161220, 177342, 193464, 214960, 236456, 241830, 266013, 295570, 322440, 354684, 386928, 443355, 472912, 483660, 532026, 591140, 644880, 709368, 886710, 967320, 1064052, 1182280, 1330065, 1418736, 1773420, 1934640, 2128104, 2364560, 2660130, 3546840, 4256208, 5320260, 7093680, 10640520, 21281040]

約数ペア:

[(1, 21281040), (2, 10640520), (3, 7093680), (4, 5320260), (5, 4256208), (6, 3546840), (8, 2660130), (9, 2364560), (10, 2128104), (11, 1934640), (12, 1773420), (15, 1418736), (16, 1330065), (18, 1182280), (20, 1064052), (22, 967320), (24, 886710), (30, 709368), (33, 644880), (36, 591140), (40, 532026), (44, 483660), (45, 472912), (48, 443355), (55, 386928), (60, 354684), (66, 322440), (72, 295570), (80, 266013), (88, 241830), (90, 236456), (99, 214960), (110, 193464), (120, 177342), (132, 161220), (144, 147785), (165, 128976), (176, 120915), (180, 118228), (198, 107480), (220, 96732), (240, 88671), (264, 80610), (330, 64488), (360, 59114), (396, 53740), (440, 48366), (495, 42992), (528, 40305), (660, 32244), (720, 29557), (792, 26870), (880, 24183), (990, 21496), (1320, 16122), (1584, 13435), (1980, 10748), (2640, 8061), (2687, 7920), (3960, 5374)]