18378776

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{131}}^1$

素因数の和:240

約数の個数: 64

約数和(自身を含む): 39916800

約数和(自身を除く): 21538024

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 52, 71, 76, 104, 131, 142, 152, 247, 262, 284, 494, 524, 568, 923, 988, 1048, 1349, 1703, 1846, 1976, 2489, 2698, 3406, 3692, 4978, 5396, 6812, 7384, 9301, 9956, 10792, 13624, 17537, 18602, 19912, 32357, 35074, 37204, 64714, 70148, 74408, 120913, 129428, 140296, 176719, 241826, 258856, 353438, 483652, 706876, 967304, 1413752, 2297347, 4594694, 9189388, 18378776]

約数ペア:

[(1, 18378776), (2, 9189388), (4, 4594694), (8, 2297347), (13, 1413752), (19, 967304), (26, 706876), (38, 483652), (52, 353438), (71, 258856), (76, 241826), (104, 176719), (131, 140296), (142, 129428), (152, 120913), (247, 74408), (262, 70148), (284, 64714), (494, 37204), (524, 35074), (568, 32357), (923, 19912), (988, 18602), (1048, 17537), (1349, 13624), (1703, 10792), (1846, 9956), (1976, 9301), (2489, 7384), (2698, 6812), (3406, 5396), (3692, 4978)]