20307420

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{227}}^1$

素因数の和:320

約数の個数: 144

約数和(自身を含む): 71705088

約数和(自身を除く): 51397668

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 71, 84, 90, 105, 126, 140, 142, 180, 210, 213, 227, 252, 284, 315, 355, 420, 426, 454, 497, 630, 639, 681, 710, 852, 908, 994, 1065, 1135, 1260, 1278, 1362, 1420, 1491, 1589, 1988, 2043, 2130, 2270, 2485, 2556, 2724, 2982, 3178, 3195, 3405, 4086, 4260, 4473, 4540, 4767, 4970, 5964, 6356, 6390, 6810, 7455, 7945, 8172, 8946, 9534, 9940, 10215, 12780, 13620, 14301, 14910, 15890, 16117, 17892, 19068, 20430, 22365, 23835, 28602, 29820, 31780, 32234, 40860, 44730, 47670, 48351, 57204, 64468, 71505, 80585, 89460, 95340, 96702, 112819, 143010, 145053, 161170, 193404, 225638, 241755, 286020, 290106, 322340, 338457, 451276, 483510, 564095, 580212, 676914, 725265, 967020, 1015371, 1128190, 1353828, 1450530, 1692285, 2030742, 2256380, 2901060, 3384570, 4061484, 5076855, 6769140, 10153710, 20307420]

約数ペア:

[(1, 20307420), (2, 10153710), (3, 6769140), (4, 5076855), (5, 4061484), (6, 3384570), (7, 2901060), (9, 2256380), (10, 2030742), (12, 1692285), (14, 1450530), (15, 1353828), (18, 1128190), (20, 1015371), (21, 967020), (28, 725265), (30, 676914), (35, 580212), (36, 564095), (42, 483510), (45, 451276), (60, 338457), (63, 322340), (70, 290106), (71, 286020), (84, 241755), (90, 225638), (105, 193404), (126, 161170), (140, 145053), (142, 143010), (180, 112819), (210, 96702), (213, 95340), (227, 89460), (252, 80585), (284, 71505), (315, 64468), (355, 57204), (420, 48351), (426, 47670), (454, 44730), (497, 40860), (630, 32234), (639, 31780), (681, 29820), (710, 28602), (852, 23835), (908, 22365), (994, 20430), (1065, 19068), (1135, 17892), (1260, 16117), (1278, 15890), (1362, 14910), (1420, 14301), (1491, 13620), (1589, 12780), (1988, 10215), (2043, 9940), (2130, 9534), (2270, 8946), (2485, 8172), (2556, 7945), (2724, 7455), (2982, 6810), (3178, 6390), (3195, 6356), (3405, 5964), (4086, 4970), (4260, 4767), (4473, 4540)]