20857680

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{491}}^1$

素因数の和:569

約数の個数: 120

約数和(自身を含む): 71379360

約数和(自身を除く): 50521680

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 59, 60, 72, 80, 90, 118, 120, 144, 177, 180, 236, 240, 295, 354, 360, 472, 491, 531, 590, 708, 720, 885, 944, 982, 1062, 1180, 1416, 1473, 1770, 1964, 2124, 2360, 2455, 2655, 2832, 2946, 3540, 3928, 4248, 4419, 4720, 4910, 5310, 5892, 7080, 7365, 7856, 8496, 8838, 9820, 10620, 11784, 14160, 14730, 17676, 19640, 21240, 22095, 23568, 28969, 29460, 35352, 39280, 42480, 44190, 57938, 58920, 70704, 86907, 88380, 115876, 117840, 144845, 173814, 176760, 231752, 260721, 289690, 347628, 353520, 434535, 463504, 521442, 579380, 695256, 869070, 1042884, 1158760, 1303605, 1390512, 1738140, 2085768, 2317520, 2607210, 3476280, 4171536, 5214420, 6952560, 10428840, 20857680]

約数ペア:

[(1, 20857680), (2, 10428840), (3, 6952560), (4, 5214420), (5, 4171536), (6, 3476280), (8, 2607210), (9, 2317520), (10, 2085768), (12, 1738140), (15, 1390512), (16, 1303605), (18, 1158760), (20, 1042884), (24, 869070), (30, 695256), (36, 579380), (40, 521442), (45, 463504), (48, 434535), (59, 353520), (60, 347628), (72, 289690), (80, 260721), (90, 231752), (118, 176760), (120, 173814), (144, 144845), (177, 117840), (180, 115876), (236, 88380), (240, 86907), (295, 70704), (354, 58920), (360, 57938), (472, 44190), (491, 42480), (531, 39280), (590, 35352), (708, 29460), (720, 28969), (885, 23568), (944, 22095), (982, 21240), (1062, 19640), (1180, 17676), (1416, 14730), (1473, 14160), (1770, 11784), (1964, 10620), (2124, 9820), (2360, 8838), (2455, 8496), (2655, 7856), (2832, 7365), (2946, 7080), (3540, 5892), (3928, 5310), (4248, 4910), (4419, 4720)]