20509360

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{131}}^1$

素因数の和:266

約数の個数: 80

約数和(自身を含む): 51068160

約数和(自身を除く): 30558800

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 103, 131, 152, 190, 206, 262, 304, 380, 412, 515, 524, 655, 760, 824, 1030, 1048, 1310, 1520, 1648, 1957, 2060, 2096, 2489, 2620, 3914, 4120, 4978, 5240, 7828, 8240, 9785, 9956, 10480, 12445, 13493, 15656, 19570, 19912, 24890, 26986, 31312, 39140, 39824, 49780, 53972, 67465, 78280, 99560, 107944, 134930, 156560, 199120, 215888, 256367, 269860, 512734, 539720, 1025468, 1079440, 1281835, 2050936, 2563670, 4101872, 5127340, 10254680, 20509360]

約数ペア:

[(1, 20509360), (2, 10254680), (4, 5127340), (5, 4101872), (8, 2563670), (10, 2050936), (16, 1281835), (19, 1079440), (20, 1025468), (38, 539720), (40, 512734), (76, 269860), (80, 256367), (95, 215888), (103, 199120), (131, 156560), (152, 134930), (190, 107944), (206, 99560), (262, 78280), (304, 67465), (380, 53972), (412, 49780), (515, 39824), (524, 39140), (655, 31312), (760, 26986), (824, 24890), (1030, 19912), (1048, 19570), (1310, 15656), (1520, 13493), (1648, 12445), (1957, 10480), (2060, 9956), (2096, 9785), (2489, 8240), (2620, 7828), (3914, 5240), (4120, 4978)]