278350280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{3851}}^1$

素因数の和:4014

約数の個数: 64

約数和(自身を含む): 679492800

約数和(自身を除く): 401142520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 139, 260, 278, 520, 556, 695, 1112, 1390, 1807, 2780, 3614, 3851, 5560, 7228, 7702, 9035, 14456, 15404, 18070, 19255, 30808, 36140, 38510, 50063, 72280, 77020, 100126, 154040, 200252, 250315, 400504, 500630, 535289, 1001260, 1070578, 2002520, 2141156, 2676445, 4282312, 5352890, 6958757, 10705780, 13917514, 21411560, 27835028, 34793785, 55670056, 69587570, 139175140, 278350280]

約数ペア:

[(1, 278350280), (2, 139175140), (4, 69587570), (5, 55670056), (8, 34793785), (10, 27835028), (13, 21411560), (20, 13917514), (26, 10705780), (40, 6958757), (52, 5352890), (65, 4282312), (104, 2676445), (130, 2141156), (139, 2002520), (260, 1070578), (278, 1001260), (520, 535289), (556, 500630), (695, 400504), (1112, 250315), (1390, 200252), (1807, 154040), (2780, 100126), (3614, 77020), (3851, 72280), (5560, 50063), (7228, 38510), (7702, 36140), (9035, 30808), (14456, 19255), (15404, 18070)]