21138120

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{827}}^1$

素因数の和:915

約数の個数: 96

約数和(自身を含む): 69750720

約数和(自身を除く): 48612600

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 71, 72, 90, 120, 142, 180, 213, 284, 355, 360, 426, 568, 639, 710, 827, 852, 1065, 1278, 1420, 1654, 1704, 2130, 2481, 2556, 2840, 3195, 3308, 4135, 4260, 4962, 5112, 6390, 6616, 7443, 8270, 8520, 9924, 12405, 12780, 14886, 16540, 19848, 24810, 25560, 29772, 33080, 37215, 49620, 58717, 59544, 74430, 99240, 117434, 148860, 176151, 234868, 293585, 297720, 352302, 469736, 528453, 587170, 704604, 880755, 1056906, 1174340, 1409208, 1761510, 2113812, 2348680, 2642265, 3523020, 4227624, 5284530, 7046040, 10569060, 21138120]

約数ペア:

[(1, 21138120), (2, 10569060), (3, 7046040), (4, 5284530), (5, 4227624), (6, 3523020), (8, 2642265), (9, 2348680), (10, 2113812), (12, 1761510), (15, 1409208), (18, 1174340), (20, 1056906), (24, 880755), (30, 704604), (36, 587170), (40, 528453), (45, 469736), (60, 352302), (71, 297720), (72, 293585), (90, 234868), (120, 176151), (142, 148860), (180, 117434), (213, 99240), (284, 74430), (355, 59544), (360, 58717), (426, 49620), (568, 37215), (639, 33080), (710, 29772), (827, 25560), (852, 24810), (1065, 19848), (1278, 16540), (1420, 14886), (1654, 12780), (1704, 12405), (2130, 9924), (2481, 8520), (2556, 8270), (2840, 7443), (3195, 6616), (3308, 6390), (4135, 5112), (4260, 4962)]