21137040

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{947}}^1$

素因数の和:997

約数の個数: 120

約数和(自身を含む): 73352448

約数和(自身を除く): 52215408

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, 947, 1116, 1240, 1395, 1488, 1860, 1894, 2232, 2480, 2790, 2841, 3720, 3788, 4464, 4735, 5580, 5682, 7440, 7576, 8523, 9470, 11160, 11364, 14205, 15152, 17046, 18940, 22320, 22728, 28410, 29357, 34092, 37880, 42615, 45456, 56820, 58714, 68184, 75760, 85230, 88071, 113640, 117428, 136368, 146785, 170460, 176142, 227280, 234856, 264213, 293570, 340920, 352284, 440355, 469712, 528426, 587140, 681840, 704568, 880710, 1056852, 1174280, 1321065, 1409136, 1761420, 2113704, 2348560, 2642130, 3522840, 4227408, 5284260, 7045680, 10568520, 21137040]

約数ペア:

[(1, 21137040), (2, 10568520), (3, 7045680), (4, 5284260), (5, 4227408), (6, 3522840), (8, 2642130), (9, 2348560), (10, 2113704), (12, 1761420), (15, 1409136), (16, 1321065), (18, 1174280), (20, 1056852), (24, 880710), (30, 704568), (31, 681840), (36, 587140), (40, 528426), (45, 469712), (48, 440355), (60, 352284), (62, 340920), (72, 293570), (80, 264213), (90, 234856), (93, 227280), (120, 176142), (124, 170460), (144, 146785), (155, 136368), (180, 117428), (186, 113640), (240, 88071), (248, 85230), (279, 75760), (310, 68184), (360, 58714), (372, 56820), (465, 45456), (496, 42615), (558, 37880), (620, 34092), (720, 29357), (744, 28410), (930, 22728), (947, 22320), (1116, 18940), (1240, 17046), (1395, 15152), (1488, 14205), (1860, 11364), (1894, 11160), (2232, 9470), (2480, 8523), (2790, 7576), (2841, 7440), (3720, 5682), (3788, 5580), (4464, 4735)]