278804920

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{170003}}^1$

素因数の和:170055

約数の個数: 32

約数和(自身を含む): 642615120

約数和(自身を除く): 363810200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 170003, 340006, 680012, 850015, 1360024, 1700030, 3400060, 6800120, 6970123, 13940246, 27880492, 34850615, 55760984, 69701230, 139402460, 278804920]

約数ペア:

[(1, 278804920), (2, 139402460), (4, 69701230), (5, 55760984), (8, 34850615), (10, 27880492), (20, 13940246), (40, 6970123), (41, 6800120), (82, 3400060), (164, 1700030), (205, 1360024), (328, 850015), (410, 680012), (820, 340006), (1640, 170003)]