21003120

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{941}}^1$

素因数の和:991

約数の個数: 120

約数和(自身を含む): 72888192

約数和(自身を除く): 51885072

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 31, 36, 40, 45, 48, 60, 62, 72, 80, 90, 93, 120, 124, 144, 155, 180, 186, 240, 248, 279, 310, 360, 372, 465, 496, 558, 620, 720, 744, 930, 941, 1116, 1240, 1395, 1488, 1860, 1882, 2232, 2480, 2790, 2823, 3720, 3764, 4464, 4705, 5580, 5646, 7440, 7528, 8469, 9410, 11160, 11292, 14115, 15056, 16938, 18820, 22320, 22584, 28230, 29171, 33876, 37640, 42345, 45168, 56460, 58342, 67752, 75280, 84690, 87513, 112920, 116684, 135504, 145855, 169380, 175026, 225840, 233368, 262539, 291710, 338760, 350052, 437565, 466736, 525078, 583420, 677520, 700104, 875130, 1050156, 1166840, 1312695, 1400208, 1750260, 2100312, 2333680, 2625390, 3500520, 4200624, 5250780, 7001040, 10501560, 21003120]

約数ペア:

[(1, 21003120), (2, 10501560), (3, 7001040), (4, 5250780), (5, 4200624), (6, 3500520), (8, 2625390), (9, 2333680), (10, 2100312), (12, 1750260), (15, 1400208), (16, 1312695), (18, 1166840), (20, 1050156), (24, 875130), (30, 700104), (31, 677520), (36, 583420), (40, 525078), (45, 466736), (48, 437565), (60, 350052), (62, 338760), (72, 291710), (80, 262539), (90, 233368), (93, 225840), (120, 175026), (124, 169380), (144, 145855), (155, 135504), (180, 116684), (186, 112920), (240, 87513), (248, 84690), (279, 75280), (310, 67752), (360, 58342), (372, 56460), (465, 45168), (496, 42345), (558, 37640), (620, 33876), (720, 29171), (744, 28230), (930, 22584), (941, 22320), (1116, 18820), (1240, 16938), (1395, 15056), (1488, 14115), (1860, 11292), (1882, 11160), (2232, 9410), (2480, 8469), (2790, 7528), (2823, 7440), (3720, 5646), (3764, 5580), (4464, 4705)]