21870660

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{173}}^1$

素因数の和:242

約数の個数: 144

約数和(自身を含む): 73313856

約数和(自身を除く): 51443196

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 43, 49, 60, 70, 84, 86, 98, 105, 129, 140, 147, 172, 173, 196, 210, 215, 245, 258, 294, 301, 346, 420, 430, 490, 516, 519, 588, 602, 645, 692, 735, 860, 865, 903, 980, 1038, 1204, 1211, 1290, 1470, 1505, 1730, 1806, 2076, 2107, 2422, 2580, 2595, 2940, 3010, 3460, 3612, 3633, 4214, 4515, 4844, 5190, 6020, 6055, 6321, 7266, 7439, 8428, 8477, 9030, 10380, 10535, 12110, 12642, 14532, 14878, 16954, 18060, 18165, 21070, 22317, 24220, 25284, 25431, 29756, 31605, 33908, 36330, 37195, 42140, 42385, 44634, 50862, 52073, 63210, 72660, 74390, 84770, 89268, 101724, 104146, 111585, 126420, 127155, 148780, 156219, 169540, 208292, 223170, 254310, 260365, 312438, 364511, 446340, 508620, 520730, 624876, 729022, 781095, 1041460, 1093533, 1458044, 1562190, 1822555, 2187066, 3124380, 3645110, 4374132, 5467665, 7290220, 10935330, 21870660]

約数ペア:

[(1, 21870660), (2, 10935330), (3, 7290220), (4, 5467665), (5, 4374132), (6, 3645110), (7, 3124380), (10, 2187066), (12, 1822555), (14, 1562190), (15, 1458044), (20, 1093533), (21, 1041460), (28, 781095), (30, 729022), (35, 624876), (42, 520730), (43, 508620), (49, 446340), (60, 364511), (70, 312438), (84, 260365), (86, 254310), (98, 223170), (105, 208292), (129, 169540), (140, 156219), (147, 148780), (172, 127155), (173, 126420), (196, 111585), (210, 104146), (215, 101724), (245, 89268), (258, 84770), (294, 74390), (301, 72660), (346, 63210), (420, 52073), (430, 50862), (490, 44634), (516, 42385), (519, 42140), (588, 37195), (602, 36330), (645, 33908), (692, 31605), (735, 29756), (860, 25431), (865, 25284), (903, 24220), (980, 22317), (1038, 21070), (1204, 18165), (1211, 18060), (1290, 16954), (1470, 14878), (1505, 14532), (1730, 12642), (1806, 12110), (2076, 10535), (2107, 10380), (2422, 9030), (2580, 8477), (2595, 8428), (2940, 7439), (3010, 7266), (3460, 6321), (3612, 6055), (3633, 6020), (4214, 5190), (4515, 4844)]