18984496

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{197}}^1\times {\mathrm{317}}^1$

素因数の和:541

約数の個数: 40

約数和(自身を含む): 39037680

約数和(自身を除く): 20053184

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 197, 304, 317, 394, 634, 788, 1268, 1576, 2536, 3152, 3743, 5072, 6023, 7486, 12046, 14972, 24092, 29944, 48184, 59888, 62449, 96368, 124898, 249796, 499592, 999184, 1186531, 2373062, 4746124, 9492248, 18984496]

約数ペア:

[(1, 18984496), (2, 9492248), (4, 4746124), (8, 2373062), (16, 1186531), (19, 999184), (38, 499592), (76, 249796), (152, 124898), (197, 96368), (304, 62449), (317, 59888), (394, 48184), (634, 29944), (788, 24092), (1268, 14972), (1576, 12046), (2536, 7486), (3152, 6023), (3743, 5072)]