280088720

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{112939}}^1$

素因数の和:112983

約数の個数: 40

約数和(自身を含む): 672218880

約数和(自身を除く): 392130160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 112939, 225878, 451756, 564695, 903512, 1129390, 1807024, 2258780, 3501109, 4517560, 7002218, 9035120, 14004436, 17505545, 28008872, 35011090, 56017744, 70022180, 140044360, 280088720]

約数ペア:

[(1, 280088720), (2, 140044360), (4, 70022180), (5, 56017744), (8, 35011090), (10, 28008872), (16, 17505545), (20, 14004436), (31, 9035120), (40, 7002218), (62, 4517560), (80, 3501109), (124, 2258780), (155, 1807024), (248, 1129390), (310, 903512), (496, 564695), (620, 451756), (1240, 225878), (2480, 112939)]