19738000

素因数分解:

$2^4\times 5^3\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:233

約数の個数: 80

約数和(自身を含む): 48746880

約数和(自身を除く): 29008880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 71, 80, 100, 125, 139, 142, 200, 250, 278, 284, 355, 400, 500, 556, 568, 695, 710, 1000, 1112, 1136, 1390, 1420, 1775, 2000, 2224, 2780, 2840, 3475, 3550, 5560, 5680, 6950, 7100, 8875, 9869, 11120, 13900, 14200, 17375, 17750, 19738, 27800, 28400, 34750, 35500, 39476, 49345, 55600, 69500, 71000, 78952, 98690, 139000, 142000, 157904, 197380, 246725, 278000, 394760, 493450, 789520, 986900, 1233625, 1973800, 2467250, 3947600, 4934500, 9869000, 19738000]

約数ペア:

[(1, 19738000), (2, 9869000), (4, 4934500), (5, 3947600), (8, 2467250), (10, 1973800), (16, 1233625), (20, 986900), (25, 789520), (40, 493450), (50, 394760), (71, 278000), (80, 246725), (100, 197380), (125, 157904), (139, 142000), (142, 139000), (200, 98690), (250, 78952), (278, 71000), (284, 69500), (355, 55600), (400, 49345), (500, 39476), (556, 35500), (568, 34750), (695, 28400), (710, 27800), (1000, 19738), (1112, 17750), (1136, 17375), (1390, 14200), (1420, 13900), (1775, 11120), (2000, 9869), (2224, 8875), (2780, 7100), (2840, 6950), (3475, 5680), (3550, 5560)]