278920540

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^2\times {\mathrm{41}}^1\times {\mathrm{643}}^1$

素因数の和:739

約数の個数: 72

約数和(自身を含む): 628216848

約数和(自身を除く): 349296308

約数列:

[1, 2, 4, 5, 10, 20, 23, 41, 46, 82, 92, 115, 164, 205, 230, 410, 460, 529, 643, 820, 943, 1058, 1286, 1886, 2116, 2572, 2645, 3215, 3772, 4715, 5290, 6430, 9430, 10580, 12860, 14789, 18860, 21689, 26363, 29578, 43378, 52726, 59156, 73945, 86756, 105452, 108445, 131815, 147890, 216890, 263630, 295780, 340147, 433780, 527260, 606349, 680294, 1212698, 1360588, 1700735, 2425396, 3031745, 3401470, 6063490, 6802940, 12126980, 13946027, 27892054, 55784108, 69730135, 139460270, 278920540]

約数ペア:

[(1, 278920540), (2, 139460270), (4, 69730135), (5, 55784108), (10, 27892054), (20, 13946027), (23, 12126980), (41, 6802940), (46, 6063490), (82, 3401470), (92, 3031745), (115, 2425396), (164, 1700735), (205, 1360588), (230, 1212698), (410, 680294), (460, 606349), (529, 527260), (643, 433780), (820, 340147), (943, 295780), (1058, 263630), (1286, 216890), (1886, 147890), (2116, 131815), (2572, 108445), (2645, 105452), (3215, 86756), (3772, 73945), (4715, 59156), (5290, 52726), (6430, 43378), (9430, 29578), (10580, 26363), (12860, 21689), (14789, 18860)]