20813280

素因数分解:

$2^5\times 3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{331}}^1$

素因数の和:480

約数の個数: 96

約数和(自身を含む): 66261888

約数和(自身を除く): 45448608

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 80, 96, 120, 131, 160, 240, 262, 331, 393, 480, 524, 655, 662, 786, 993, 1048, 1310, 1324, 1572, 1655, 1965, 1986, 2096, 2620, 2648, 3144, 3310, 3930, 3972, 4192, 4965, 5240, 5296, 6288, 6620, 7860, 7944, 9930, 10480, 10592, 12576, 13240, 15720, 15888, 19860, 20960, 26480, 31440, 31776, 39720, 43361, 52960, 62880, 79440, 86722, 130083, 158880, 173444, 216805, 260166, 346888, 433610, 520332, 650415, 693776, 867220, 1040664, 1300830, 1387552, 1734440, 2081328, 2601660, 3468880, 4162656, 5203320, 6937760, 10406640, 20813280]

約数ペア:

[(1, 20813280), (2, 10406640), (3, 6937760), (4, 5203320), (5, 4162656), (6, 3468880), (8, 2601660), (10, 2081328), (12, 1734440), (15, 1387552), (16, 1300830), (20, 1040664), (24, 867220), (30, 693776), (32, 650415), (40, 520332), (48, 433610), (60, 346888), (80, 260166), (96, 216805), (120, 173444), (131, 158880), (160, 130083), (240, 86722), (262, 79440), (331, 62880), (393, 52960), (480, 43361), (524, 39720), (655, 31776), (662, 31440), (786, 26480), (993, 20960), (1048, 19860), (1310, 15888), (1324, 15720), (1572, 13240), (1655, 12576), (1965, 10592), (1986, 10480), (2096, 9930), (2620, 7944), (2648, 7860), (3144, 6620), (3310, 6288), (3930, 5296), (3972, 5240), (4192, 4965)]