19988912

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{1399}}^1$

素因数の和:1473

約数の個数: 40

約数和(自身を含む): 41664000

約数和(自身を除く): 21675088

約数列:

[1, 2, 4, 8, 16, 19, 38, 47, 76, 94, 152, 188, 304, 376, 752, 893, 1399, 1786, 2798, 3572, 5596, 7144, 11192, 14288, 22384, 26581, 53162, 65753, 106324, 131506, 212648, 263012, 425296, 526024, 1052048, 1249307, 2498614, 4997228, 9994456, 19988912]

約数ペア:

[(1, 19988912), (2, 9994456), (4, 4997228), (8, 2498614), (16, 1249307), (19, 1052048), (38, 526024), (47, 425296), (76, 263012), (94, 212648), (152, 131506), (188, 106324), (304, 65753), (376, 53162), (752, 26581), (893, 22384), (1399, 14288), (1786, 11192), (2798, 7144), (3572, 5596)]